How young is too young or how old is to old to read yaoi?

I’m mean there really isn’t a too young unless they are reading some hardcore straight up sex yaois then...yeah but i can’t really put an age to it because i grew up in yaoi it started off with shounen ai but when i became 11 discovered that there could be more . And for too old there is no answer because i know once I’m 89 (if I make it ) ......   reply