How to Do It I thought it was a fluke—until it happened again. Photo illustration by Slate. Photo by Zeynep Uyanik/Getty Images Plus. How to Do It is Slate’s sex advice column.  Have a question?  Send it to Stoya and Rich here.  It’s anonymous! Dear How to Do It, I am a 30-year-old woman, and I am seeing a new guy. We recently slept together for the first time after like a month of just dates (rare for me to go this slow these days), so we had a lot of built-up sexual energy. It was fun, and I was enjoying that experience of delayed gratification. The only problem is we’ve had sex twice now, and he keeps doing something that kills the momentum every time. We’ve opted for condoms, which I would think would help a bit with this problem, but he also keeps pulling out over and over while we hook up to last longer. It’s really taking me out of the moment and messing up the rhythm, especially because he tends to do it when things are getting good, obviously.…