Straight guy in his 30’s dad bod. But who I am kidding probably Bi. Just starting fucking my ass with dildos. Cummed without jerking. Is that normal?

I just bought 3 dildos out of curiosity, every one bigger then the last. I ended up riding a thrusting horse cock I bought. It hurt, like brought tears to my eyes. When I turned on the thrusting and vibration it whimpered but didn’t stop and went deeper. At the same time felt good. I ended up cumming without jerking. Ass had been throbbing all day. Is this normal to cum without jerking a cock for first time having a painful dildo up my ass?