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