How, exactly, do we develop bike butt?

[snowroo]

Wouldn't know. You know this is all in jest, right? (although I do kinda like speedskater bootie).

[cylegoddess]

I have one of those bums! Its just hidden, inside my 'other' bum!!( I can feelit in there somewhere!)
I find it most amusing, perving( as we say in Oz - means, looking !) on guys riding. You check someone out who looks 25 from the back and from the front , its someone my dad's age gotta love it!