well actually there are to groups of girls ones that know love and the ones that don't know love those are the ones that well rip your heart out, Heartless.
Why are many men heartless? Both are heartless in their own little ways, usually made that way by each other. It's only the suck up men that get used by heartless girls, while all the heartless men are out using decent women for sex. Decent people rarely come across each other before its to late. If people stopped letting their life experiences determine their opinions of an enter group, whatever group that might be, we'd have less sexism, less racism, less selfishness, less bigotry, less whatever word a bunch of pansies made up at some point in history just to spite a group that spites theirs.