Can I beat a transgender person to a pulp?
Why do you feel like you want to beat them?
I decided to do that after staring at her tits for almost five minutes straight.
It sounds like you are either confused about your feelings or don't want to admit an attraction. Either way, you should never turn those feelings into a physical assault.
I like tits and can't help myself. My years of testosterone made me what i am today.
Having a certain body part you enjoy isn't wrong, what's wrong is feeling violent towards the person you are attracted too. If necessary, you might want to talk to an expert on the repressed feelings before someone is hurt.