au natural

From the submitter:

My husband and i couldn't help but say *DING* when the pictures pop up so we just had to animate it and put the *DING* in for everyone else!

Eye candy really gets those guessing juices flowing. And, uh, other juices.

If that's really him, I give him props for cycling au natural, and hope for his sake his scrotum has at least some form of protection.

I'm going to guess the character on the left is a guy.