I can’t imagine getting involved at all in my kids’ intimate lives. No researching, no purchasing, etc. I suppose if they asked me, maybe, but they appear to have been quite capable on their own.
When they’ve had friends over post high school they’ve always been able to decide if they want the same bed or bedroom or not. That’s about as far as it goes.
If my folks had gotten involved with my intimate life I’d have been livid, so that likely colors how I’ve treated my guys.