It's a very rewarding experience if planned properly.
The girl, will had an enema, prrior to the meet, she'll trim, shave as she desires.
The guys will stick their dicks over the bathroom sink, splash some water - lol
The gurl will be sure to drink more water, her wetness is let's say a third from vaginal walls, rest is piss. Drinking water, and pissing, will eliminate the smell of urine, simple.
For all, have some pinnapple before, will change the tast of your and her cum. Do not eat other fruits, before going for a dp, u do not want a polish sausage comming out of her ass.
Listen to her demands, and follow her lead. Women know how to make a memorable evening, night, week - end.
What ever touches the ass, does not go in pussy or mouth, without proper washing. You put the woman that is giving you pleasure, in danger. And yourself - antibiotics do not work.
I like more to be the guy on the top, letting the other guy on his back, she is cowgirl, and I'll fill her butt. Fucking an ass is more intense, so I'll finish first, and admire her getting a full creamed pussy.
Be happy people