[M]21 first time sex with a prostitute

So here it is,
I’m 21 years old and I’m still a virgin, I’m not shy anymore, I’m just extremely bad in seduction.
The fact that I’ve never had sex really worked on me, I looked at escort websites for months before I dared to call one to make an appointment.

She was a 40-something woman, dark-haired, fairly thin and very attractive. I warned her that it was my first time, she told me that it was not a problem for her.
However, I had only one requirement, I thought it was a shame to make love with a prostitute for the first time, so I asked her if I could do only sodomy, to keep my first vaginal intercourse with my future girlfriend (if God wants it). She accepted for an extra 50$.

The day I arrived at her place, she welcomed me in a very sexy outfit, I was impatient to go further with her. We start to put ourselves on the bed, and we discuss almost 15 minutes (I had taken an appointment of 2 hours) and she asked me to remove my clothes and to put me in boxers, thing that I made immediately.