Why does a guy like “69’ing, and isn’t grossed out by squirting”

I don’t really get the 69 part like he always wants to do it but i can never focus on him and i feel gross from that angle.. and my back hurts. why can’t he just have normal sex 😂😂 and he isn’t grossed out by me squirting even though I am cause it’s literally pee.... also and fingering my ass??? like i don’t get the point of it either.. shouldn’t guys be grossed out by all of that?