I think, no matter what the setting is, even an orgy, it's pretty rude for a guy to just unannounced approach a woman and start entering a hole.<br/><br/>That said, once a character feels confident about what's going on, I'm sure there's no problem just walking up and asking. That said, if someone says "Sorry, I'd prefer not", don't flip out because "it's an orgy what do you expect". Some people like a whole group of people having sex. Doesn't mean they want to become a penis pin-cushion or like their playmate being distracted by so many other dicks flopping around.<br/><br/>Manners, people. Be sure to haz them. :)