I mean I'm sure that he does because hes 16 and has had 3 girlfriends and has a mom so I'm sure he knows what it is
Does Justin Bieber Know That Girls Have Period?
Yeah hes gone through puberty himself , he knows girls go through puberty aswell which obviously involves periods plus theres always tampon's , and sanitary towel adverts on television so he knows
You I mean hez a boy, but boyz hav 2 learn bout girl stff 2