Where did I go wrong? What’s changed ?

So I had to have that talk with my son about what was appropriate sexually.  My wife saw his browsing history and it was nothing but anal fisting lesbians. 

So I ruin his dreams and fantasy’s telling him most lesbians don’t look like the ones in porn and woman don’t like to be fisted anally.   It looked like I took his favorite toy from him 

Fast forward to this weekend he brings home his girlfriend and he is definitely punching above his weight class.  

He takes me and his older brother aside and goes guess what dad.  She likes to be choked, have anal and be fisted. Oh and she is bi 

Now I’m doubting everything what the hell have things changed that much?