Nothing wrong with it, but I don't think we should idolize it. If some people choose that kind of life, they should be free to. I don't think it should be encouraged though
I'm curious where you see people glorifying promiscuity. In most pop culture being "the slut" is a negative trait in a character, to the point that there's an entire genre of entertainment (slasher flicks) in which being "the slut" is a death sentence.