Which first time are we referring to? The first time with a provider, or the first time actually scoring with a provider?
Trust me, I had the opposite experience as IV's "nervous" customer. My first time with a provider, I used an escort agency and rented one of those No-tel Motel rooms that went $25 for the hour. We get to the room. The girl (who was smoking hot) went to freshen up and gave the obligatory request for me to get comfortable. I strip down to my undies. After about 5 minutes, she finally comes out of the bathroom and sees that I'm "over dressed". She pulls down my undies. We get on the bed, and she simply starts to caress me and I blow my load. This was well before the day of MSOG, so within 2 minutes, she's dressed and out the door. I have about a half a dozen other similar experiences from providers. Finally, I went to a "cat-house" where I finally was able to score before false starting. To top it off, she gave me a BJ as well after the initial sex.