Three questions

Question 1

Etiology: why does the preference develop at all?

That sexual arousal can be conditioned to a previously neutral cue is the strongest empirical result in the vicinity. Rachman (1966, Psychological Record) paired a photograph of women’s boots with slides of nude women in three men and obtained five successive sexual responses to the boots. Rachman and Hodgson (1968) replicated with five men and a backward-conditioning control in which nobody reached criterion. Hoffmann, Janssen and Turner (2004, Archives of Sexual Behavior) showed genital conditioning in women and men, including to a subliminal CS. Hoffmann, Peterson and Garner (2012) moved the pairing into couples’ real sexual lives with odors. Pfaus and colleagues (2012 review, same journal) show, in rats, that first sexual reward can stamp partner odors, even noxious ones, and even a jacket.

Empirical finding: cue-to-arousal learning exists in humans and is robust in other mammals. Theoretical interpretation: some, perhaps many, human fetishes are instances of that learning, possibly in a sensitive period. Speculation: a particular childhood foot massage “caused” a particular adult. The last step is E5 unless independently corroborated.

Neurological case reports (temporal-lobe epilepsy, Klüver-Bucy phenomena, dopamine-agonist impulse control in Parkinson disease) show that sexual targeting can change when limbic and dopaminergic systems are perturbed. They do not show that typical podophilia is a lesion syndrome. Genetics of foot fetishism specifically: absent. Twin and family work on paraphilias in general is sparse and not foot-specific (Gorman 1964, one MZ pair; Labelle et al. 2012, five selected families; Finnish twin work on other paraphilias).

Unknown, stated as such: we do not know the typical developmental pathway. We do not know what fraction of foot fetishism is conditioned, imprinted, adjacent-cortical, or some mixture. We do not know why most people exposed to similar childhood foot experiences do not develop the interest.

Question 2

Specificity: why feet?

Scorolli et al. (2007) counted 381 English-language Yahoo discussion groups. Among preferences for a body part or feature, “feet, toes” accounted for 47% of group members in that subtable (their Table 2). Objects associated with feet (shoes, boots, stockings) led the object table. Three indices (groups, members, messages) agreed (Cronbach’s α = 0.91). This is the best relative-prevalence number in print. It is not a population prevalence. It is an internet-community snapshot with self-selection, English-language, and platform bias.

Turnbull, Lovett, Chaldecott and Lucas (2014, Cortex, 53, 146-154) asked about 800 people, mainly in the British Isles and Sub-Saharan Africa, to rate 41 body parts for erogenous intensity. Feet rated low, near upper arms and navel. Adjacent S1 sites did not intercorrelate as Ramachandran’s spillover story predicts. Cortical stimulation of S1 is historically not erotogenic. Their conclusion: S1 is an unlikely home for the erotic map, which may live elsewhere (insula and affective systems are the usual candidates, still E3).

Kell, von Kriegstein, Rösler, Kleinschmidt and Laufs (2005, Journal of Neuroscience) placed the penis about 1 cm lateral to the toe on the postcentral convexity, not on the mesial wall where Penfield drew it. Later fMRI, including female genital mapping (Knop et al. 2022), generally agrees that genitals sit in somatotopic sequence with the legs. Foot and genitals remain neighbors. Neighborliness is cheaper evidence than cross-activation, and cross-activation is cheaper evidence than “this is why fetishes exist.”

If the adjacency hypothesis were true, it would be the single cleanest account of foot specificity among current options. The Turnbull ratings are the strongest direct empirical strike against using S1 as the erotic map. The hypothesis survives only as E3, and only if one relocates the map or restricts the claim to a minority whose feet are erogenous in the tactile sense, which is not how most fetishistic desire presents (often visual, often about shoes, often about someone else’s feet).

Historical particularity is the other specificity engine: Chinese footbinding as an institution of concealment, connoisseurship, and erotics (Levy 1966; van Gulik 1961; Wang 2000; Ko 2005). Ellis thought the Western foot/shoe fetish re-emerged from an older, wider sexual symbolism of the foot. That is E4. It does not tell you why a boy in Ohio in 2004 fixates on sneakers.

Unknown: there is no experiment that randomly assigns early foot-versus-hand pairing and follows sexual outcome. There is no imaging study of people with primary podophilia versus controls that tests S1 cross-activation during foot versus genital stimulation. Until one of those exists, specificity is the least settled of the three questions.

Question 3

Maintenance: why it lasts, and why the internet era matters

Once a cue predicts sexual reward, two ordinary processes keep it alive: further pairing (including masturbation to the cue), and resistance to extinction when intermittent reinforcement continues. That is textbook learning theory applied analogically. Direct longitudinal evidence in foot fetishism is essentially absent. Grade for the application: E3, resting on E1-E2 conditioning work in other cues.

Weinberg’s respondents described interests that could change in object (boots to sneakers) while keeping a theme (for them, often masculinity). Symbol and sensation both mattered. Partnered incorporation was common in that sample. Maintenance, in other words, can be social, not only solitary.

The internet does three distinguishable things:

1. Measurement. It makes hidden preferences countable (Scorolli). That can look like an epidemic of new tastes when it is an epidemic of new visibility.
2. Concentration and script. Communities, tags, and recommenders gather people who already have the interest, supply endless exemplars, and teach a vocabulary. Whether this creates de novo preferences in people who would otherwise have had none is untested. Distinction: discovery versus installation.
3. Market. Foot content is a visible niche on subscription platforms. Journalism and creator reports describe real money and real demand. That is sociology of supply (mostly E5 as currently published). A market can intensify rehearsal; it does not, by itself, explain childhood onset.

Joyal and Carpentier (2017, Journal of Sex Research, 54, 161-171): in a Québec sample matching provincial norms (N = 1,040), 44.5% reported desire related to fetishism and 26.3% reported lifetime experience, with online respondents acknowledging more than telephone respondents. Fetishism here is the DSM class, not feet. Mode effects are themselves a finding: asking in private raises the count.

Shekarchi et al. 2025: ego-dystonic clusters show more depression. Maintenance of distress is a different process from maintenance of desire. Religion, in that sample, did not predict presence; it may shape whether the person can live with the interest.

Unknown: we cannot presently say whether average intensity of podophilia has increased, decreased, or stayed flat since 1990, because we lack comparable population items that name feet across decades.