A person who only has sex with people who ride bikes. Alternately, a person who is turned on by bikes and bike culture, specifically in a sexual way.

Voluntarily Celibate.
A person who chooses to be celibate. Can be for any given amount of time, for a short period or for their entire life. Can be for religious reasons or not.

related: incel

Someone who replaces a human being with a bike. A 'bikesexual' could live without any human-human sexual contact as long as they were able to ride their bike. Being denied their bike could result in several withdrawal symptoms. A 'bikesexual' could become frustrated, upset and introverted. A feeling of loneliness could also be experienced.

To be attracted to only people who ride bikes or are involved in bicycle culture.

previously totally heterosexual male who would now rather mount his bike than a woman; usually travel in groups; wear tight spandex shorts without thinking it’s gay in the least; prefer looking at bike sites more than porn sites; not gay but not worth dating

To only feel sexual desire to bicycles. This can include motorised bicycles.

Unlike guys who like gals, guys, or guys and gals; bike-sexual guys are only into bikes.