Oh gosh... I've had this conversation with Dave a time or two. He has on occasion twisted off and thought with his "little Dave brain" more than his big Dave brain. I have no problem calling him on this, but, alas, he just loves sex. Luckily, it's a rare thing.
Ok... I love sex, too... but... we've had to have that important conversation that he does not have my permission to volunteer me to meet a couple that night and have sex with them without talking with me first.
He's also PMd with couples without my knowledge and before I know it, he's set up a meeting. He tells me about it after the fact, but again, he's just too damn excited.
I say this in a loving way and I'm actually smiling as I type this: He's a He-whore and he knows it.
I know with my honey, I have to remind him that we're a couple and we play as a couple. We do things together which mean we talk about meetings and we talk about these potential couples together. He does the basic work of looking and talking with them, but he's supposed to be telling me about these wonderful people before setting up dates, ideas, etc.
He knows that, but gets carried away once in a while.
There was a couple that we met last month. He was the PMer and talked with her/him. I had no idea they even existed for a week or so. Between the three of them, they'd already kinda set up a play date. Right before we left to go meet, I told him to please not count his chickens because I hadn't even talked to them, although I did see a picture of them. I wasn't sure I'd even be attracted to either one of them. Great thing for all four of us, we hit it off immediately.
He's lived and learned. Just takes some real communication and reminding once in a while that I'm with part of the couple.