I've been thinking back on my (over 30 year, on and off) sexual history. No intention of posting gory details, so trolly mctrolls can give up reading at this point. But in abstract terms. It was uncomfortable and sometimes painful for quite a long time. I had trouble "letting go" in order to orgasm. I'd be almost there, then start to feel over-stimulated and it would just become irritating. I kind of went off sex.
The thing that turned it round was a totally lovely boyfriend who was a committed Catholic - and a pragmatist. He wasn't going to break the rules, so no PIV (or indeed P in any orifice) before marriage, but believed in having a good time short of that. We had a very satisfying, lovely and loving sex live with no PIV. The next relationship I had, I went back to PIV, and barring an episode of vaginismus early on, it was fantastic. I finally got what the fuss was about.
But it's left me with very little patience with people who insist that only PIV can be proper sex. (Had a long argument about this one on a writers' forum about a year back - with other middle aged women. I was trying to argue for an imaginary medieval fantasy society without contraception, but where young couples had non PIV sex until such time as they were ready to have sex - and was amazed to find that pretty much everyone else thought this was completely unbelievable and wasn't real sex. Weird IMO, but they were very insistent.)