12. Jane, 20

We met at a video game tournament for about ten minutes and got along well, so we added each other on Facebook. Three days later, we met up halfway for a smaller tournament. I went back with him to his apartment, and things went well. We ended up spending a few days together just hanging out and having sex. I think he was looking for something casual and I was looking for a summer fling, just someone to hang out and have sex with before I went back to college 12 hours away. But we started spending more time talking and really just spending time with each other (in between the sex). He stopped seeing someone else that he had been having casual sex with about a week after we started seeing each other because he knew it was developing into something more. We said ‘I love you’ about three weeks in, and now six months later I’ve moved in for a year (working in the industry before returning to school). So our whole relationship just moved really quickly: sex three days after meeting, definitively exclusive two weeks later, ‘I love you’ about two weeks after that, and I moved in (temporarily) five months later. We are now approaching eight months together.

13. RC, 25

One-night stand off of Tinder turned out to be the most amazing person I have ever met in my life. I had no expectations from the beginning. Will this be just a date? Will we have sex? etc. We really liked each other from our first date. Hung out more and more often. Less than a month together, we began an ‘official’ relationship. It just felt right. It’s almost been one year now. Can’t wait for more years to come. I love being a ‘Tinder success story.’

14. Heather, 27

Things were casual for about six months, then they got pretty serious pretty fast. We were both really surprised, but everything worked out great. I think that because we started as friends and then transitioned into casually hooking up, all that pretense was gone. We knew who we were as people, so the sex just made things even more intimate and, most importantly, more honest. Having sex with my best friend is probably the best thing on this planet. We are open about everything and there is no judgment. It’s going on six years, and we are getting married this year.

15. Ash, 32

I was fresh out of a dead bedroom relationship. It had been a year and I was jonesing. He was recently single as well and we’d always had sexual tension, and he was the perfect booty call for all the aforementioned reasons. One night turned into two, and so on. Conversations got deeper, a bond grew, and suddenly sex turned into feelings. Feelings turned into the most unexpectedly amazing relationship I’ve ever had! We’ve been together a little over two years and counting.

16. Rob, 32

I was recently divorced from my high school sweetheart. We had been together for almost 10 years, and I had never been with anybody else. In the few years that followed, I only saw women casually. I wanted to see what was out there. I started having casual sex with a new coworker during my period of casual hook-ups. She was also recently out of a bad relationship and not looking to get caught up in another. Eventually, we became friends. Then, we realized we were spending 24/7 together for months without getting sick of each other. About 6 months after the initial hookup, we were ‘dating.’ We’ve been together about five years now, and have two children. Best relationship I’ve ever had, and I can’t imagine better.