Guys, does this really bother you?
I've heard about some guys who are bothered that their gf/w1fe has had more l0vers/se# partners than they did. It has never bothered me though. Maybe because having a lot of partners isn't really an indication that a person really has more experience or knowledge because of it.
It's just like virgins: we tend to have the mean idea that a virgin doesn't know jack about "doing it" yet society is filled with lots of se#ually active men and women who are terrible at "doing it," refuse to do it right, and can be embarrassed when a virgin shows us up!