I lost mine at 19. Funny thing was that my first time was a threesome too. And I got to nut inside as she was sterile. It was scary at first and I did a shit job but whatever. Now, what was truly terrifying for me was having sex for the first time with the girl I'm still currently with. Thankfully I did a good job that time around lol. Itwas definitely way worse since so much was on the line.