<human>: Summarize the given text in a few sentences.

We've been together for a little over six months now. The event is for a fraternity that she is connected to and people there can buy favors for anyone attending and one of them is eating whipped cream off that person's body. I feel like this crosses boundaries and my girlfriend is saying that it won't mean anything and that it's for a fundraiser. I told her that it's the act itself that makes me upset despite the intentions behind it. 

Additionally, I initially thought it was a closed invitation event, but it's open and I only found out through Facebook. She said she didn't invite me cause she's looking out for me saying that I wouldn't want to see guys eating whipped cream off of her if it does end up happening. What do I do? It makes me feel so shitty thinking about it but there's a chance it wouldn't happen if no one buys the favor for her.
<bot>: Several guys might eat whipped cream off of my girlfriend's body for a fundraiser. Am I being irrational for being angry?