A male who expects a female to accept his romantic advances simply because he is "nice," and is angered when she does not.
Possible causes for this phenomenon:
1.) He views romance as a prize he is entitled to, like his allowance, as long as he behaves himself.
2.) He thinks all women are the same dainty, smiling, flower-picking Disney
princess, who want
nothing more in a man than giant smiles, polite chit-chat, poetry readings, and doors held opened for them. He does not understand that women are individuals.
3.) He has a mental disability that encourages girls to put on a super-nice act around him, as they would around a child. He mistakes this for their
real personality, and thinks they are really getting to know each other and clicking, when...no. (This one's pretty tragic, and no one's fault, really.)
4.) He's a really bad actor, so even girls who DO want a "nice, sensitive
guy" can see right through his crap.
5.) He is a genuinely nice
guy, but only goes for hot girls he has nothing in common with...while complaining that girls always go for the "wrong"
guy.
6.) A closeted
homosexual or transsexual, who has discovered how conveniently the "nice
guy" motif can cover up his secret. ("I'm just not a man's man!") This can leave a bad impression on the girl, after she learns the truth. She may become so paranoid, that if the next
guy she dates cheats on her with another
woman, she may break into a joyful jig, exclaiming, "My boyfriend is straight!"