Just one observation.
You don't have top be good looking. But you have to be someone who is friendly, charismatic, good in words, takes initiative in doing things, shower genuine love (friendship love, not BGR type), care and concern to your potential preys.
And more importantly, are you willing to invest your time to "listen to her problems" and be her very good and trusted friend? If yes, and you manage to gain her trust, then you have a near 80% chance of bedding them.
Took me nearly a year before I finally established a very very good friendship with a hot girl in my school. I knew her sicne day 1 in school, but it's only year three until we became super good friends. So good until I can go to her empty house and alone in her room teaching her some homework and tutorials, and also share heart to heart problems. And yes, she has a bf that time.
Finally took her V in year 4. And the feeling is fantastic knowing there are nearly 10 guys who wanted to befriend her to bed her. Yes, she is that hot. And the feeling of finally tasting the forbidden fruit that so many desires, and not getting into a r/s with her, is the icing on the cake. Banged her for almost three years before she finally getting married. Now moving on to another FB of mine.

Same tactic, same patience, and boy am I rewarded.