Iin2always be attracted to people who are more monogamous than you
I've been in relationships pretty much ever since the age of 16.
I was with my first serious partner from 16-21 (4.5 years!!) and got with my current partner a week after my first one and I split up.
We'll have been together for 2 years in December and - apparently - this is the longest relationship he's ever been in.
One thing both partners have in common is that sex is less important for them than it is for me and believe in monogamy far more strongly than I do.