Just got the perfect definition for some of us, directly from the Urban Dictionary…
Unlike guys who like gals, guys, or guys and gals; bike-sexual guys are only into bikes.
“I’m into him but it seems like he’s not into me. At first I thought he was stuck on his x-girlfriend but now I think he’s just bike-sexual”
well, I’m not into this bike-sexual stuff – I like girls! 😉 – but sometimes we (All Mountain Addicts) do seem to be a little bike-sexual… see you in the trails!