I'm having a three day affair
What's going to come out of this affair?
I want to experience sex and I will be able to brag about it
If you want to experience sex, why not just do it with your partner? That makes no sense and it sounds like you're just trying to find a reason to cheat, which is horrible. Your partner loves and trusts you, and you think it's that easy to just stab them in the back and sleep around.
It sounds that you are close minded. There is nothing wrong with what I am doing.
It is not being close minded to think people should respect their partners and not have an affair. If you want to have another relationship, you should end the one you are in.