<human>: Provide a brief overview of the text.

So we have been together 4 years and both only had one other sexual partner before. I know he loves me and would never cheat on me and i feel the same but it is still always in the back of my head, what happens when one of us gets curious sense we never "slept around". I guess we don't really know what is out there but it is not worth cheating and ruining our relationship. But i will admit i have gotten curious and i know he has. 

Anyway, so today i said we should have a 3some. First we can with a girl then another time with a guy. we could get our "curiosity" out of the way without necessarily cheating and have some fun doing it. i think most guys would want to have a 3some. All he really heard is that i want to have sex with another guy, which i don't really. And i could tell i hurt his feelings. I tried explaining myself and i think it made things worse.

One reason why he could say no that i might understand is we had somewhat of a foursome before(but really just me and the girl making out and then we had sex with our partners) at one point we did like a 4 way 69 but that was as far as it went. He ended up asking to have sex with her and i said no and was really upset for weeks after. keep in mind this was over 2 years ago and i was battling depression and had really low self esteem at that time so i took it as i'm not good enough. i have changed a lot now and am more confident.

So if anyone has any advice/experience/input it would be much appreciated. i just want to know why he got upset. and if it is even a good idea. i'm just looking to spice up our sex life.
<bot>: I asked my boyfriend if we could have a 3some with a girl then sometime after another with a guy. he got upset thinking i just wanted sex with someone else. help