Very few people have excellent recall. Possibly nobody does about something so non-binary as an extended sexual encounter. Memory is a story we tell ourselves about the past.

However, I bet you do remember it better than it was. So keep your memories. They're much better for this than a video record.

Yes, there is that :)

I don't get the point of handcuffs in the bedroom, but some people like them, so that's up to them.

If you don't understand someone's sexual preference, the correct response is no response. You're not obligated to comment on everything.

No user is obliged to post or comment on anything at all, what do you do on a forum if you think that way?

But if I don't comment the conversation isn't about me anymore!

It was never just about you, it's about you and others. If your only contribution is along the lines of "doesn't look like something I have a use for", perhaps it's best to leave the discussion to people that would use it and/or try to learn a bit behind why those preferences exist.

You can't imagine that other people might not have 'excellent recall'?