Superman and Wonder Woman
One day Superman was flying along, feeling kind of horny. He had a busy day ahead of him, but just had to satisfy his urge. So he decided he would fly over to Wonder Woman's house to see what she was doing. As he got closer he used his x-ray vision, and to his suprise, Wonder Women was lying on her bed totally nude.
Superman thought "this is great! I'll just zip right in there, do my business, and before she knows it, I'll be gone." So, Superman blasts in, right on top of Wonder Woman, does the deed at light speed, and is gone in a flash. Wonder Woman, not quite knowing what hit her said "WHOA! What was that?" and the Invisible Man replied. "I don't know, but my arse sure is sore!"