I'm thinking of banging and punching the woman.
Oh my, why do you want to hit her?
I would do that because she's only 20 years old and I find old women the most attractive type
If you are upset about her age, you can always leave. It is not okay to get into a physical altercation with anyone. Abusive behavior is harmful and there is a major chance that you will face legal consequences.
That is so negative, hookups happen all the time and no one gets hurt.
Abusing someone because you don't approve of how old they are is illogical and completely wrong. You need to reconsider your actions and walk away from the relationship completely, for your sake and theirs.