Masturbation through the eyes of the 'emasculated' boyfriend

So last week’s lecture made us realise that the girls can actually keep up with the guys in the old masturbation stakes. That’s good, everybody like equality.
Well, actually no, they don’t.
Yes, this man hates the fact that his girlfriend uses a vibrator. He feels emasculated.
If his concern is 100% legitimate then I think he is the one engaging in the bad behaviour; not her. He’s being completely unreasonable, and should be grateful that the only substitution she has for him is plastic.
Clearly he should move with the times and accept that masturbation isn’t a big deal anymore, and neither are vibrators. There’s no way his girlfriend should suffer because of his insecurity, clearly he’s not delivering the big O, so he needs to accept the little v.