My SO has been talking allot about having a threesome. But I'm not down. I mean I have been with a girl before but that was back in high school I'm 27 was supposed to graduate in early 2000's but I dropped out and just got my GED, girls are very different and loose now. And I'm sorry but if we do it with another guy then I feel like I'll be having a train ran on me. I am not scared to try it I just think that sex should be with only the person your in a relationship with. Does that make me old school? What if we do it and he likes the other girl more? I don't want to go down on the other girl but what else is there to do? I'm confused and frankly I want to be open and try things with my SO. But um I am stuck on what to do. Someone please help me!