BF's satisfaction...

My boyfriend doesn't seem to feel satisfaction when he ejaculates...anyone else's boyf get the same thing? He says it just makes him feel weiry (although he still enjoys sex due to it satisfying me) 
He lost his virginity to me so it's hard to tell whether it's me causing it or just him but I've never had this problem with previous sexual partners...anyone able to give me some tips on to help it out??