I'm with you. I've never though any good came out of sharing details.My philosophy is the numbers -- whether high or low -- make everybody crazy. So never share the exact #.
On the rare occasion when I was younger if somebody had the temerity to ask, I'd change the subject. If pressed, I'd give health details -- no STDs; no high risk behavior, etc.
My standard response was always "I have had enough partner that I know what I'm doing & what I like but no so many that I can't look myself in the mirror." To me that was the end of the discussion. Because anybody who didn't take that as my response & kept pushing for info I was never going to give them, was shown the door out of my life.
So if you have a "high" count however that is defined, own it. You made those decisions. Hopefully nobody forced you. If you were forced, those are different issues. Otherwise your choice was your choice. Maybe you wish you made other choices but now you have learned from the bad choices & they still shape who you are now so hold your head high because you turned out alright or are on your way to alright. If you have a "low" number be happy you made good choices & got it right or if you hate your low number take steps to add to it. Either way, the exact number is nobody's business & you shouldn't be shamed for your choices in either direction.
I don't lie if asked and I certainly share things that are currently relevant but beyond that you have to ask what you want to know. This also helps you avoid sharing things your partner doesn't want to know.
My bf hasn't asked me anything and I don't ask him anything. He knows I've been married twice and have 2 kids and I know he's never been married and has no kids.
What else is relevant? There's nothing shocking about my past.