Just a heads up, I'm going to try to keep this post non-explicit and matter-of-fact, but it kind of necessitates references to some non-standard/"alternative" sex stuff. There's also a brief mention of SH.

My T told me my homework assignment for this weekend was to find something fun to do. I did, but I don't think it was exactly what he had in mind. I attended a sex party at a BDSM club.
I wasn't necessarily planning on discussing it with him, but now I'm thinking I probably should for a variety of reasons even though I really don't want to. It's not something we've ever discussed before—a med that I was on for my SH also made this stuff not enjoyable so I haven't done it in a while, but I recently stopped taking the med.

We've kind of discussed sex before, but never in any degree of detail. I'm almost certain he'll be fine with discussing it and won't be uncomfortable. But I certainly will be. He said the word "orgasm" once and I felt like I was going to die of embarrassment.
And he's going to be thinking about me being in these situations. Not in a way that's inappropriate but just because it's impossible to discuss something without thinking about it. And I'm probably going to have to get somewhat detailed to discuss how it's different from SH and to address the concerns I'm sure he'll have about my safety.

This whole thing is much more embarrassment than shame, unlike most of the stuff we discuss. But one of the reasons I need to talk to him about it is discussing the aftercare stuff and my feelings about that. And there's so much shame there. And I'm absolutely dreading explaining that part far more than anything about the sex stuff that happens before. Though I'm certainly not looking forward to explaining the sex stuff either.

I have no idea how much, if anything, he knows about this stuff. I'm really hoping I don't have to explain the very basics. Is this something most therapists would have some knowledge about?
Has anyone had to talk to their T about something like this? How did they handle it?
Any insight or advice for just talking about sex stuff in general? Is it awkward?
I'd also just appreciate support or pity for having to have this talk with my T. Or feel free to laugh. I'll probably find this funny someday once it's over with.
Commiseration if you've had to discuss something equally embarrassing and personal with your T?
How do I even go about bringing this up? "Guess what I did this weekend?"

Ugh. This is okay to talk to him about, right? This is the kind of thing I should discuss with him, right? Sigh.