Women are amazing, they can adapt and all women have a natural inner instinct to reproduce. Sex is one of those basic instincts and taking multiple loads of cum is one of the things that come naturally. My wife loves threesomes, and most of the time our sex life is MFM threesome activity. She says two cocks are very good at satisfying her.
She also enjoys having three men together, it is not as common but when it is available my wife goes for it eagerly. MMFM normally involves all of her holes but ultimately she loves and craves for us all to cum inside her pussy.