Have you ever practiced tantric sex?

A girl proposed it to me and explained how it worked and that it was one of the best experiences I was going to be able to have, but I was not sure and we left it in the air, the next day I was investigating and everything seemed too strange and I did not know if I wanted to practice tantric sex, maybe it was because I am very old-fashioned, but I didn't do it, have you ever done tantric sex?