Prolly normal for two dudes in a crouching doggy style position ramming and slamming and jamming. Yup I'd say thats normal. Hope they cleaned out the blowhole. The stench has to be unbearable after a while.
I cannot go forward in my life if I try to withhold hatred and discontent for others in my heart - therefore, I do not care what other consenting adults desire - I wish them all the best. Now let's all move on.