It should be noted:
- In some circles, "MMF" refers to bisexual action: action involving two men and a woman, inclusive of man-on-man sexual contact. And "MFM" means two males sharing the female, heterosexually (--at least without the fellows trying physically, directly to get off with each other). This is the distinction in terminology used in swinging circles, apparently. But in porn, MMF means, often, straight MFM. And in punting, it seems we've adopted the looser porn definitions. To avoid disappointment/awkwardness it may be good to clarify this with the SP/co-punter before the action begins.
- MFM/MMF/3P is sometimes more cost-effective. Some SPs provide a group discount rather than charging simply double the regular fee. That is a good sign, it shows they're into it, I reckon. It's nice to give the girl a treat, sometimes, isn't it? And it's nice to fill a girl up completely with dicks.