A couple of years back I used to think that women that said this ^ were misguided. But now I know better, there are really people (women and men) out there that just don't feel desperate for sexual fulfillment like most.
I respect the fact that you know yourself enough to know exactly what you personally need and don't need out of a man.
I'd just like to point out the dangers of looking at sex as an obligation though. That can bring resentment in the long-run brehette. So I myself would suggest you approach sex as in a way to see a side of your man you don't get to see otherwise. A side that, maybe orgasm aside, you can fall for or learn to appreciate.
I remember that one the really good aspects of sex for me often was just how I could surprise my girlfriend with an expected push or a pull to a different direction mid-coitus. Just that particular thing made sex both unique and special...orgasm aside.
An obligation is a much less attractive endeavor, in fact the definition of it...
An act or course of action to which a person is morally or legally bound; a duty or commitment: he has enough cash to meet his present obligations | [ with infinitive ] : I have an obligation to look after her.
• the condition of being morally or legally bound to do something: they are under no obligation to stick to the scheme.
• a debt of gratitude for a service or favor: she didn't want to be under an obligation to him.
• Law a binding agreement committing a person to a payment or other action.
...has one too many words that one does not want to ever see attributed to sex itself.
