Cycling is a wonderful sport. It has everything, such as bulges, bulges and bulges. Also quads that are ten times bigger than arms. That comes in handy when you want a guy to have the lower body stamina to ride your cock and the upper body weakness that lets you move him where you want him. If you're into such things.
Green also means go. As in go ask a professional cyclist if you can crouch in front of his crotch, have him role one leg up of his shorts (or do it yourself), and take a picture that hoards of guys will jack off too.
As a professional spandex-based life form, the cyclist of course said yes. So let's not disappoint him. Ready, set, jack!