A nice guy is either one of two types:

The first being a guy who is genuinely kind and caring. He is polite to everyone regardless of sex, age or race. He has no ulterior motive, i.e. he is not nice to get a reward, he behaves as such because it's human decency.

The second kind of nice guy is the one who has ulterior motives. He believes that because he behaves in a certain way the world owes him for his actions. He doesn't make it clear what he desires from the beginning and becomes angry when he doesn't get what he wants.

A real nice guy is a guy who is just NICE. Kind, caring and understanding but without expecting a reward for it.

A self declared nice guy however is usually a guy who will be nice to you and expect some sort of romantic or sexual reward.

The self declared nice guys usually are the ones who complain about being friendzoned.

(Noun, adjective.), A human male whom treats women as property and status and assumes just because they're kind to them, they're entitled to their bodies and assets. They often times appeal as a kind and compassionate man at the beginning of a relationship, but slowly become more controlling and demeaning towards his partner as the relationship progresses.

Similar to an incel, in the sense that they feel women owe them sex due to them being “nice” to them, but in reality are unbelievably terrible people who live on the borderline of sex offenders and stalkers based on how many of them treat women. A nice guy tends to come on too strong, ask creepy personal questions and then go apeshit when a woman denies them sex, a date, or says they’re seeing someone else and not see the hypocrisy of them calling themselves a “nice guy”.

1. A manipulative male that forms friendships with females under the false pretense that it won't be a sexual relationship. All the while actually lusting after the female. He is then generally confused as to why the female goes after males that are open about their desires, and blames the female when it is his own fault for creating a friendship when he really wanted to date her.

2. The guy that's always there for his friends.

A badge of martyrdom. Men who spend their most of their time whining about how women “just want to date jerks”. Oblivious to the fact that no one finds people who feel sorry for themselves attractive, much less people who blame others for their lack of success. Most self proclaimed “nice guys” are just as self-centered and misogynistic as the jerks they gripe about, they are just much more spineless. To stupid to figure why women don’t find them attractive, they conclude that in order to get laid they must treat a woman like shit.

They tend to befriend women with the expectation that women owe them something more than friendship, then get all pissed off when the women tells them she’s not interested. Often going after women who are already in relationships, they misrepresent their intentions and try to use emotional manipulation and the facade of friendship as an excuse to get closer to them and score with them.

The sort of man who will give my definition a thumbs down. :)

A man who is to afraid to speak his mind. Often times they will complain about how they are mistreated by women and hate the "Alpha's", "Frat Guy" ,"Athletes" and label them as troglodytes. What the nice guys fail to realize, is they are weak at a fundamental level. They only befriend the girls who are attractive because they have hopes that the friendship will result in sex or relationship. They kling on to these attractive woman because they do not have enough confidence in themselves to say they deserve more and better from these relationships. The pandering fool often is depressed because though he feels that he is close to the girl, he understands fundamentally the woman will not grow to like him. This is because girls are attracted to confidence on a very basic level. The obsequious ways of the nice guy are the embodiment of lack of confidence and self loathing. Nice guys do not strive to be jerks but good men. The difference in the two paradigms is this, nice guys do what they do to receive validation and praise, good men do what they want because they want to. Good men are truthful, honest and blunt.

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!"

A man who thinks that basic respect for women is a personality trait and wears said "personality trait" like a trophy; an incel.