I defined it for a reason. I'm not saying that anyone is stupid, but I think we forget what the word truly means. I had to go look it up myself. LOL
Some people on dating sites are not there for games. They are there to make a connection. Notice I didn't just say women. And I also didn't say relationship. Sometimes we make a connection with someone and figure out that it's better to stay friends. And the fact that two people can come to that understanding mutually, that's maturity.
I know I'm not the best looking girl in town. In fact in Vegas you need to be a model to find a guy. It's disheartening. But I've had guys message me on dating sites and if I'm not interested I say so. Maturity is when they say okay and thanks for responding. What is immature is when I say I'm not interested and wish them luck in their search and they proceed to call me names and such.
Word of advice, if a girl says no, just leave it as such. Thank her for replying and move on. There is no need to call her anything. It's a rejection, it happens. Get over it and keep trucking.
That's the thing about maturity.
Last piece of advice and I'll go into later on, don't say you want a nice girl and when one messages you, you turn her down. More explanation later.