Not sure exactly what you wish to know or why, but I'll answer you, young lady.
Basically, my view on sex can be stated by quoting that famous tiger. "It's Gr-r-reat!!"
I do believe however that sex is best and best practiced between married couples (married to each other, lol.) But that is my opinion and my morals and I realize many others will think otherwise.
How often is healthy? Well, I don't think it is unhealthy at all no matter how often. Of course, I am no doctor, but my wife and I have a rather good sex life, even after 30 years, and neither of us seems to be showing any ill affects of it.
Did that answer your questions?