Is it normal that i am very turned on by humiliation?

Is it normal that i am very turned on by being made fun of about my small dick? i found out when my ex and i were together and she cheated and got with another guy and gave him a hand job. when i found out i confronted her nd her comment was "he has a dig bick" and then i asked "how big"? she answered, "if i would have let him fuck me i'd be to loose for you, you wouldnt have to get me wet to fuck me. and later on at a party he was there and we were too, she said she wanted to have sex with me. so we got together down stairs and she started acting uninterested, i asked if it was cause him. she said yeah. i asked to fuck, she said no, and then we were argueing, and she finally just said, "you're too small for me". i asked if she wanted him instead, she said yes because he has a huge dick, and then she asked me if i wanted her to go get him so he could teach me how to please a girl. i said no. we left the party together and went to her house. i asked her to fuck, she said okay. she layed on her stomach and put her butt in the air. i asked her how much bigger he was and she said 3 inches. i then was hard. i felt for her pussy and spread it a bit and put my dick in, she didnt make a sound. i pushed it in as far as i could and still got no reaction. i started fucking her as hard as i could and she didnt make a sound. i came in about a minute. and she wasnt pleasured at all.