Re: who would do this anyway?
It's a myth that multiple sex partners causes the vagina to go loose. The real deal is you have to strengthen your pelvic floor, girls. Do your kegels, do pilates, do yoga, strengthen your core muscles, as those also support your pelvic floor.
You shouldn't use soap of any kind on your vagina. The vagina should be fairly acidic to keep it free of bacteria, and soap destroys that Ph balance. Wash once per day using just warm water and your hand. Twice a day maybe while your menstruating.
Yes, eating right, and green juices are awesome for every facet of health, but when it comes to the yoni - work it out. Oh...and have LOTS of cllmaxs. That strengthens the pelvic floor as well. ;) That's the fun way to do it.
You also might be surprised what men go through to please a woman. Every man I've been with has put a lot of energy, and creativity into ensuring that we both have a good time. Men aren't worthless, and not all men cheat. No more than women do. We're no angels either. You laid a big ol' stone from your shoulder into this posting.