I always prefer to be seeing 2 women in the same time. I find that this keeps me balanced and sane, lol.
I don't do this too much now as I am married (at least I try not to).
Used to do this a lot when I was single, as a way not to get too attached to anyone, as women in general have the ability to drive us nuts sometimes, when we in fact try to focus on other things such as careers, making $$ etc.

That's why this SD/SB 'thing of ours' is so great. All cards are already on the table.

Sometimes, however, I do wonder. Will I ever be able to have a 'normal' relationship outside this SD thing? I am married so I already have a 'real' relationship. But what would happen if I were divorced? Or has this SD life condemned me to a future of doom and mutual benefits?