First let me say I wouldn't call myself a "Bi-sexual Male" but more "Bi-curious"

I have been in a relationship with my girlfriend for 5 years and have been having sex for 3 of them. The sex we are having is always great and I wouldn't change a thing. She has come out to me as bi and I completely support her and love her for that. I have always seen myself as an open minded person and one who supports the LGBTQ community. However, even with this, I have never imagined myself performing any gay sexual acts, or if I have I have repressed them because I know that I am straight and I had this idea in my head that doing gay acts were wrong and that I shouldn't do them. That was, until recently.

Over the past year, my girlfriend and I have talked about seriously having a threesome and we both agreed that our third will be a girl since that is something we have in common. This was the first domino that was pushed that made me think of what it would actually be like if I was with another man. Then over the last few weeks I have been thinking about what it would be like if I did pursue and try to have a gay sexual experience. I have talked with my girlfriend about this and she has no issue with me trying to do that and almost encourages me to try it. I now almost have a craving for a cock in my mouth and pleasuring a man to the point that he cums. I have started watching Bi-sexual porn and I think some scenes are so much hotter than the other porn I usually watch. The sight of a man and woman sucking and fucking another man only makes me want to do it more.

I was just wondering if anybody had an idea on how would I go about doing it in a discrete way so nobody I know would find out and could attack me for doing something so "gay." I want to be discrete in the beginning while I am still trying to figure myself out in all of this.