Mongoloid Droid

A guy who manages to masturbate with a flacid penis, next to someone else, without being noticed. Usually only using 2 fingers on the penis.

For example, a guy is in bed together with a girl that is sleeping. The guy proceeds to play with his genitals using only 2 fingers and without getting hard - and he does so until he ejaculates. He tries his best to go unnoticed but it can not be a guarantee. Usually they get hot and sweaty in their faces as well.

It can happen anytime and anywhere.

Example 1 - in the bed:
Girl: Why is the bed shaking?
Guy: I don't know. I didn't notice anything.
Girl: Don't tell me you're one of those Mongoloid Droids...
Guy: Maybe.

Example 2 - on public transportation:
Person 1: Why is that guy sweating so much? He is just sitting still.
Person 2: He is probably one of those Mongoloid Droids. Just look at how he tries to hide his hand under the jacket. You can also see his hand moving slightly.