I did this picture with the idea of making it look like Batgirl fell on Robin. It turned out looking WAY more suggestive than I ever intended. I was just going to forget it, just put the sketch version in my scraps, but I had an hour free so... here you go.
Batgirl was created by Gardner Fox and Carmine Infantino. Robin was created by Bill Finger and Bob Kane. Both are DC Comics characters.