i know this is gonna sound cocky, but my boys and i are all gursikhs and we have absolutely no trouble with girls (sikhs and non-sikhs).
Its because we are all so confident in ourselves. and i love what guruji's student said above. . .
"they keep cutting the gift that GURU JI is givint them .. but guru ji still keeps giving although they keepgettin rid of it !1"
and in reply to the second part of your post, i'm not sure exactly why its easier for our pehnjis to get 'away' with cutting their kes. (the fact that you termed cutting your kes as 'getting away' makes me think that you probably are not feeling sikhi anymore either). regardless, its an unfortunate part of the downward trend our sikhi is traveling in.