I recently got into a debate about how someone's sexual past influences their present partner.

I was basically arguing that if my partner did something sexually with her exes but she refused to do so with me, I would be hurt. I would even consider splitting.

I understand that people's sexuality and tastes change with time. While I agree with that statement, I think anyone would be hurt if their partner did something with their ex that they now refuse to do with you.

Let's say your partner gave oral sex to his/her ex. But now he/she refuse to do so with you because he/she is not into it anymore. Would that be a Dealbreaker ?

Edit: the oral sex is only an example. You can replace it with anal sex, or some other sexual activity that isn't vanilla. Or it even could be that they immediately had sex with their ex, but wanna make you wait.

The point I'm trying to make is, are you okay with your partner treating your ex better sexually than they do for you.