Is it normal my boyfriend got upset cause i said groupies are bitches?

Yesterday evening we were listening to some music, then suddenly my BF commented that singer A had sex with a girl friend of him, and he said as it was cool, then he add of course he would take her because she is funny and also very hot. I can not stand groupies but I tried to kept silent and let it go. After not even five minutes he kinda wanted to do some foreplay with me, but while I was very horny before he said this stupid thing, now I was not at all and I told him honestly I did not feel like doing stuff right now after I had to hear about that story. For me groupies are idiot bitches that are just a shame for the female generation and I love groups like Soundgarden for example who never wanted this kind of attention. To resolve it wanted to show me the photo of this friend but I said to be honest I really don t need to see or meet a groupie bitch, I m just totally not interested. Then he got offended and went alone in the room for 1h watching bullshit video and said that "I m a bitch for saying his friend is a bitch". Well sorry but her friend is a bitch, and I am not that s why I dont like these stupid people. I also have a girlfriend who went groupie with metallica and System of the Dawn, I know and think she is just a bitch, I can t hold a conversation with her to be honest so I never see her even if she is visiting more than a couple of superficial words I do not have. Today seems normal, but still I mean come on? A groupie is just a bitch sorry, a person with problems for me and wikipedia doesn t go soft on the definition either.