How do I fake an orgasm and make it look convincing?

[Anonymous]

Ok I've got a new boyfriend he's very nice, got good job n stuff but he's kinda small (roughly 5inches) he tries his best with it then on failure tries to satisfy me with oral but gets no where. I don't normally have trouble orgasming but I'm more used to normal guys around 7 inches. How can I fake my orgasms as realistically as possible to protect his dignity?

[Anonymous]

Guys can usually tell no matter what