He notices Wonder Woman sunbathing nude on the rooftop of a luxurious hotel suite, so he thinks to himself; "Hmm, if I can fly faster than the speed of light, I can probably have sex with her and she won't even know what happened!"
He swoops down to where she is, does the deed, then flies away with a big smile.
Startled, Wonder Woman says, "What the hell was that?"
"I don't know but my ass hurts," replied The Invisible Man.