I might share that, especially while I was drunk, (I have ADHD with autistic features) but afterwards I would so, so, so, cringe.
'But, why should I "expect" judgment, when it's wrong?'
It's not a matter of 'judgement' as such, but of what people might be concerned about, understandably (albeit maybe unfairly.) I would know that from what I said, they would think/know I was at some point relatively promiscuous. If your DP has only had two partners, then anything you say (and from what you say, it wasn't particularly a small number) will come across as promiscuous.
People think things- if you can't handle this or anticipate what people will potentially think, maybe you have undiagnosed ASD or something. One has to be careful what one says, especially with 'in laws.'
You presumably ideally want to win/stay on their good side. To do that with anyone, you have to watch what you say.
They will unfortunately (and probably not rightly) be thinking you're a bit of a slapper now, and be concerned that you might cheat on your OH.
Please be careful what you say to your 'in laws' in future, if you want to get on with them and them to like you and be ok with your DP being with you. Maybe you don't care about that- most people would.
Their reaction was not unusual- I'd say it was the norm, whether someone's parents showed it or not. They would be concerned that someone would not be faithful. I've had quite a wild sex life at times (less so at others.) The average number of partners for a woman (that they admit to) is about 6. www.independent.co.uk/life-style/love-sex/have-i-had-an-average-amount-of-sexual-partners-10297819.html Those of us who've had many more (or even just more than our partner) would ideally somehow be careful how we broach the subject/what we say when it's discussed.
Again- I might do the same sometime- but I would totally cringe!