Yes, that sounds very much like me too.
I'm strictly monogamous, can't imagine actually being with someone else than my wife.
Fantasising is another matter, though. In that respect the only thing I've been able to rule out is being a gay man, so the current hypothesis is that I'm about half attracted to the opposite sex, about half attracted to women. None of the choices seemed close enough, so I didn't vote.
Nfr