DH and I have been together 35 years since late teens. Have 3 grown up kids.
We only have sex about once a week now (mid 50s) and post menopause I don't always orgasm from PIV.
However for the first 30 years of our relationship we had simultaneous orgasms about 90-95 percent of the time, from PIV, mostly by being attuned to each other - he slows right down to let me catch up, for example.
I never thought we had a particularly amazing sex life but reading info that wasn't readily available back in 1990 when we met, I had no idea most women don't reach orgasm from PIV. We are very vanilla too - 3 positions mainly, never done anal or used toys. But we just seemed to work together.
Is this really unusual?