Bad experiences. No experience at my age would be a very bad sign. With my husband, we each had one crazy ex, then he had a couple of two year relationships that weren’t bad just sort of ran their course. Apparently when he met me he knew it could work out long term but I was afraid he was only good for two years, so just took it kinda slow, not sex-wise but relationship-wise. Waited two years to move in together (we both had kids so it was a good idea regardless) then he started making noise about getting married, I told him he could ask after we’d lived together two years.
Best relationship of my life so far, 12 years in, we are both well aware how good we have it, because we have both had the bad times. His kids won’t even talk to their mom - in the divorce the courts gave him custody not just of his kids, but his step kids too, that is how bad she got, and she has not improved. My ex’s mom said if it came to it she would argue her son should not even have visitation, that’s how bad he got (we weren’t married so that part was easier). He has improved when he quit drinking, thank God and now sometimes hangs out, like at holidays, parties, etc.
So I would argue for experience use but caution. Not someone with a string of crazy exes.