A query about dry ruined orgasms when they are empty

so, my wife’s favorite thing right now is for me to penetrate her and repeatedly pull out and ruin it on her ass/stomach or pussy, last night I did this about 5 times before cum stopped coming out, then did it like 3 more times, but obviously nothing came out, until finally I couldn’t do it again and didn’t pull out, but…the what Im guessing 9th or so time, I had extremely strong contractions, to the point it scared me, felt like my testicles literally were being pulled thru my body. Obviously though nothing came out, and for about 10 min or 30 maybe I felt post orgasmic sexual lull…then I was super horny again. My question is…what exactly is this orgasm…is it ruined? the dry one, I had contractions, but no cum, and I honestly debate whether I want to experience that its so intense and odd. I mean I do, but, is it safe it was intense THanks