I am M26, this happened a few years back. I was 21 and I was in a long distance relationship with a 19 year old girl, she had amazing tits and ass and had a fat body but that only made her more competitive when it came to sex and she is one of the kinkiest girl I know. We started as friends but we slowly started to talk about sex and soon we were talking about all our fantasies and kinks, that is when we got into a relationship and it was mostly sexual and I noticed that whenever I would tell her about some girl I liked looking at or some porn I liked, she would come up with a fantasy that was even more sluttier in nature.
We would often also talk about our friends and their sex lives, she would often tell me about how girls in her hostel sneak out to have sex and then talk about it and I used to get all the details while she tried to degrade them and scandalise me. She was also a self-styled feminist though and didn’t see the irony of degrading other women when she had started to herself act more and more slutty each day when I asked her to, wearing thinner and tighter clothes or forgoing underwear while going to classes and would often either degrade them or get offended on behalf of other girls because of their sexual activities.