<human>: I really don't trust this guy's judgment when it comes to interaction with other women. Do I think he will cheat, not intentionally, but his attitude will put him in situations where it's more likely to happen.

I found out that he texted couple of women he had intimate relationships with just to ask them how they are doing. One of the girls he contacted out of the blue actually exposed him to serious STD. Why keep that contact going? The other girl he contacted knows he has a GF and initially said she would not send him any provocative things but then he kept chatting with her so now she sends him a sexy pic or two here and there. 

He gets super defensive and angry and calls me dramatic when I react poorly to his interaction with other girls when we are in public. That happened once (me getting upset), but enough for him to tell me I'm melodramatic. He also asked if I was cheated on before again using a "right back at ya" technique. He says he would never cheat and never cheated. I know he means it, but his actions tell me he is immature or unaware of how things work. If I talk to a complete stranger guy in a bar out of a blue, I'm doing it because I'm interested. My BF thinks girls are asking him q's because we are all just people. He wants to be that naive and it's really bothering me.

I'm really not cool with him refusing to discuss this and calling me dramatic. I think it's another sign of immaturity that he is unable to address my concerns in any other way but to be dismissive/ defensive.

My knowledge of his dealing with women is affecting how I see even innocent interactions he has with women. I simply don't trust him. I would really like some feedback from men who have been on the other side of this argument.

Give me the gist of the text in a nutshell
<bot>: BF doesn't have the same idea as I doabout what are appropriate/safe boundaries when it comes to opposite sex interactions and it's causing me to get insecure