When you see the size/colour of the penis, and also when you see how short the masturbation session is. Throw in a shot of what is being masturbated to, and some clips of the sounds the person is making, and you have a funny show.
Make sure you put your finger in her butt, then sneak into his room before cleaning your finger and give him a Hitler (mark of shit under his nose that looks like the Hitler 'stache).