NICE GUYS FINISH LAST THATS WHY ILL TREAT U LIKE TRASH ITS, NOT WHAT I REALLY WANNA DO, BUT, YOU ONLY DATE BAD GUYS, SO ILL GIVE YA MY BEST TRY TO, TREAT U THE WAY U WANT ME TO! sorry... its a song. and to answer ur question... they dont, they find the best girls and get to live the happiest lives. it all works out better in the end for them!
Because chicks who aren't interested don't wanna be rude, so they kinda lead the nice guy on. Meanwhile, the nice guy misses his chance with ten other chicks cause he is trying to use his niceness on the same chick way longer than he should.