Ok, that's way too scientific for me, lol.
And to answer your question, no I don't think you're nuts. Although I am very new to this. In my extensive scholarly reading on sex (doing the Groucho Marx eyebrow wiggle right now) one of the most profound things I read lately was when it comes to sex, you and your partner make your own rules. As long as you're open and honest with one another, it doesn't matter if your sex life is the same as the next couple's. It's about you (plural). Oh, that was from Glamour magazine.
(I really have read a bunch about sex; Glamour's monthly 'you're not gonna believe this awesome sex move!' articles are old hat for me, lol)