Henry Cavill once suffered what we can only imagine to be pretty embarrassing he got an erection at a really inconvenient time. Although we can't really blame him?he was filming a sex scene?that doesn't take away from his humiliation. He explained to the magazine, "It's only happened to me once, and it was very embarrassing. A girl had to be on top of me, she had spectacular breasts, and I hadn't rearranged my?stuff into a harmless position.