For anyone seeking to understand how male sexual desires are formed, men's interest in feet might be the most educational example.
Feet are one of the four body parts that straight and gay men in every country search for online. (The others are chests, buttocks, and penises). There is very strong evidence that the male brain comes wired with a biological predisposition to attending to feet. But of all the male anatomical cues, the foot cue expresses itself with the greatest diversity of variations, suggesting that there might be something more to this anatomical cue than mere visuals.
The foot is a classical example of a male sexual cue that gives rise to a kaleidoscopic variety of cued interests: pantyhose, stockings, heels, ankles, calves, sandals, high heels, socks, toes, boots, boot licking, foot bandages. Also, specific actions by the feet are popular, such as trampling, tripping, plunging into mud or dirt, rubbing on penises, stepping on small animals, stepping on balloons, stepping on a man's face or head. Many male celebrities have come out (sometimes unintentionally) about their erotic interest in feet, including Jets coach Rex Ryan, actor Jack Black, rapper Ludacris, and film director Quentin Tarantino.
How does a man's specific interest in silky pantyhose or five-inch heels get formed? Following cue theory, during a man's critical period of sexual desire formation, his innate foot cue makes him more likely to pay attention to feet and makes him more receptive to foot-related stimuli. If through chance or culture he is then exposed to a strong foot-related experience—a woman sticking her foot in a thirteen-year-old's face or watching your first girlfriend slowly unroll her black stockings—then the foot-related details of the experience are more likely to get imprinted. Also increasing the odds of imprinting upon a foot-related stimuli are the strong odors associated with feet; odors and tactile sensations enhance the likelihood of imprinting upon a sexual experience.