If she's 27 and they met 2 years ago, it's not that bad. Let's say she started riding hog at 18 (even tho it was probably earlier), that's a little under 3 guys per year. Factor in that it was probably concentrated more towards the 18-22 years, it's really pretty normal.     There are girls who sleep with a new guy every month (sometimes even more than that), and it's still viewed as a 'normal' thing to do for people that age. Over the same span vs the gf in OP, that's 84 partners. 20 is a blessing to find if you start dating anyone over 25.       BUUUUT I can see how this seems low for someone who doesn't have friends and never goes out.