This is a pretty complicated question — depending on the context, the answer could be very different. Do you mean girl friends as in female friends? Or do you mean you’re dating both of them? And if so, do they know about each other? Do they get along? Are they attracted to each other? Do they want a group sex experience? So many questions!
Whatever the case, a real-life threesome is a pretty hard thing to orchestrate, even for porn stars. I remember one time, I had sex with two dudes at once. That’s the whole story — my point is that it only happened one time.
As a woman, though, I’d say the best way for a man to get me to agree to a threesome is to just strike up the conversation during sex — when I’m getting dicked down, that’s the best time to get me excited about an idea. Maybe the next time you’re having sex, tell your partner how beautiful she looks, followed by “I wanna watch you going down on another girl,” and see how it goes. If there’s any possibility of a threesome happening, you’ll find out. Keep in mind, though: if it’s an absolute no-go, you’ll find out pretty quickly, and you should not press the issue. Nothing’s less sexy than a guy who doesn’t understand “no.”
Article source: https://www.menshealth.com/sex-women/asa-akira-on-oral-sex-threesomes-and-the-best-sex-position