@ajhnh I guess it would depend on the child, but in general, I do not think I would allow anything like this until they were like seniors, and heading off to college anyway. Fifteen seems young to me.
I have read more and more social media posts about this; I think it is sort of a side effect of the helicopter, constant surveillance, and safety movement — that basically parents know kids are having sex anyway, and rather than having the kid parked somewhere in the back of a vehicle or risking public indecency, some parents just want to give them a safe space…
I have mixed feelings. Fortunately, my teen boys have never wanted to do this, and
knock on wood I cannot foresee it in the near future either.