Had sex with asleep boyfriend

my boyfriend and I are very sexually active, but he always comes too quickly and I have to masturbate to get myself off. Never once got an orgasm during sex. One night he fell asleep snoring and I was extremely horny. I started stroking him as a joke to wake him up for a quicky, then I started sucking his dick, he was still sleeping. I then got on top of him and slowly rode him and got my first sex orgasm. I clean he up nicely and he doesn't remember anything in the morning. Everynight after sex, I now lay and wait for the snoring and f**k him in his sleep to get my orgasm. I haven't told him yet. I think the secret is a turn on for me. Is this wrong or normal? I mean, he never gets me off, this is the only way...