When behaving as a bitch, you should expect someone demanding you bend over. When this occurs, you bend your waist so that you ass is pointed upwards, so that your anus is well exposed (and scrotum). Then, you shall expect a dick to be inserted into your anus. When being throbbed, tension appropriately and actively adjust to give the best experience.
Important:
If you don't bend over properly or your anus isn't exposed well enough, you will be penalized by having to give a blow job after they finish in your ass,
Immediately.
After they finish, they are entitled to giving your ass a slap or give a quick yank to your scrotum. Only then, are you allowed to
straighten up.