Walk up to him, explain yourself and be a man about it. Round the conversation off with a hearty handshake, and a sly wink if you're feeling brave.
Don't do this. Pretend it never happened.Serious answer: talk to him a few days later.
Just act like normal, go ask him what he wanted. Don't make an issue of it.
I can't believe I'm actually reading a masturbation thread on OcUK.
I can't believe I'm actually reading a masturbation thread on OcUK.