Someone please talk me down.
13 yo DS is going as a foursome to watch a film with his GF (in loosest sense; they're at school together but whole relationship takes place via text!)) plus mate and his GF.
Was not easy for me to agree to him going but assumed it was all very sweet and would be good to loosen the apron strings a bit.
Anyway I just checked his phone and saw a conversation between him and GF "do you wanna talk about anything sexual?"...."does size matter?"...
Thankfully that's as explicit as it gets but I am horrified and petrified in equal measure! He's 13 FFS!
I know the way teenage boys minds work but to openly discuss these things at this age? Also I appreciate in this era of tech and social media it is all too easy to make throw away statements but can't quite believe the brass neck. Christ, just holding hands at 13 was a huge deal for me. No way would I have been openly discussing penis size with a boyfriend 
So where do I go with this? Am so appalled am considering not letting him go to the cinema but don't think that is necessarily the best way to deal with this.
Feeling like I'm losing my boy