While it seems that one can't tweet a shoe emoji without hitting an online foot fetishist, those who get off to navels do not show themselves so readily. Yes, belly button porn is findable, but not in the same centralized, commodified, and advertised way as other jerk-off material in There is no XBelly or NavelHub. On mainstream porn sites, you won't see banners advertising horny teens in search of daddies to fuck them where their umbilical cords used to be. While nearly every other fetish seems to have unionized in some way--under the banner of shared search terms or a common website--it seemed to me initially that belly button lovers remain both discrete, as in isolated, and discreet, as in private.

This article is part of an ongoing series in which Ravishly editor Katie Tandy explores the psychology behind a fetish, and writer Jetta Rae DoubleCakes writes erotic fiction. Named Color Me Kinky, the series refers to the "hanky code," a system in which certain colors connote one's sexual interests and proclivities in public spaces. Ah, the navel. We all know it's for gazing and gathering lint, but did you know it was also for worship? For inspiring great ardor and lust?

Navel fetish and why some people are really into those innies. Like, the greatest thing ever, obviously. And this is a sex-positive, non-judgmental space, so please take all of this in that vein.