Never had sex with males, but I'd imagine so. Most of the videos floating around on the web show (at least females) moaning each time there's a spasm inside her. Usually the pulsing scrotum and pulsing asshole on the male indicates a spasm that dumps cum into his bitch, which is super fucking hot in my opinion. Dogs also ejaculate like 4 or 5 times more than humans do from what I've seen. With the knot, there's not many places to go except almost directly into the cervix. Especially knotted. Hell, I've seen women cum just from a dog releasing inside her, no thrusting or anything. But everyone is different.