So I've been sleeping with 2 guys lately. I'm on birth control and I spent the week at guy #1 house for a week and every time he came in me my vagina had a strong fish smell. I just bought some cheap lube and we thought it could be from that because it didn't happen before but the last time we didn't use the lube but it still had the smell. But when I got back I spent the night a guy #2 house about 2 days later and he came inside of me and had no smell and everything was fine. I would like to know why is the smell happening and why is it only with guy #1