I think i'm Bi-curious? Not sure..?

Okay the thing is, i'm not attracted to men in any way, i couldn't imagine touching another mans "junk" In a sexual way. Although if it was in a medicalish way it wouldn't bother me. But any way, i'm very attracted to girls and women. I'm married, and i'm 24. The thing is lately in our relationship during sex my wife has been adding "stimulation" to the area in question... I really do enjoy it, and just yesterday she asked me if it would turn me off having a guy with me and me with her, the thought didn't turn me off. But then again it wasn't exciting either it was just neutral. I don't THINK i'm bi-curious, but at the same time the sexual sensations feel good, and i enjoy that. But again i'm not attracted to guys in any form which is why i'm so thrown off. I guess if i didn't have to see them and they were there "participating" I wouldn't care, it would be alright. But if i had to know they were there and messing with me, it would really kill the moment. Although at the same time, i have strong fantasies of seeing another guy sleep with my wife.. I have thoughts of joining in, but the guy and I stay seprate and just tend to my wife. I'm so confused >.<