He is 18, I am 16. What is the psychology behind guys mentioning that he has had many past sexual partners. He even goes as far as to send me photos of him with other women and then tells me he has made out, done things with these girls? I do not give him much of a reaction, but he keeps talking to me about this and it makes me very uncomfortable. Why does he do this? I don't find it attractive, it makes him seem weird.