UPDATE-aio because my girlfriend wants to go to the club

For context, my girlfriend and i had an argument a while back about her going to the club for her 18th birthday. It was a couple days after the initial thing that upset but didnt tell her about right then. We were downstairs with her sister and her boyfriend and we were all playing a game and we had a movie on (about strippers) but not really paying attention. My girlfriend looks over to the tv and says something about the way they move and to be honest, pretty ignorantly said she gets to go to the club when she was 18.

I thought of it completely differently than she did because we were raised differently. I said basically that it makes me uncomfortable thinking of her going and that i dont want her to. She responds with I don’t get to make that decision for her and it made her upset that i brung it up out of the blue.

I talked to my friend about it and said “im just gonna say i hope she has fun and i dont want her to have any lap dances” (her brother got 4) and i just went about it. Recently it got brought back up again and I told her what i told my friend and she says that lap dances are the whole point of going. She explains to me that its just for fun, its not like she’s cheating and it genuinely made sense. She even suggested me going aswell when im 18 and saying that she’ll go with me and pay for me to get the same things she will and said that “most of the women are married and its not their first time with a nervous 18 year old boy”

This made me feel better, HOWEVER, my heart still skips a beat thinking about her going and theres still a little piece of me that thinks “its women with very little to nothing on dancing on her” and it makes me nervous. How do I get over that feeling so I feel less of a dick about it??