TIFU by complaining about grooming

So I (m29) and my gf (f 25) hit a bit if a rough patch. She has been really busy with her graduate school and I have not been the best support for her.

One particular thing that we argued about was her grooming. She got a touch lazy with her shaving etc and it was something that bothered me.

I told her that I like her hairless. She said she would try but asked if I could cut her a bit of slack. In the moment I made the mistake of insisting that she maintain that for me.

I have since realized my error in judgement and I have apologized. She said she forgives me...but asked if do one favor for her.

She wants me to go to a spa day with her, and she said I will cover it. Made me promise to go. So I agreed

Out of curiosity I asked her what we will be doing and she said bot to worry, she booked me a package.

Reddit, what should I expect? Im a bit of a man's man so never been to a spa before.

TL;DR- was not considerate to gf about grooming and now I have to go to a spa day not knowing what to expect