The problem is you can't prove your age with BTC.
Teenagers don't prove their age when they use their Dad's credit card to sign up for porn either, get what I mean?
A porn site will ask a user to verify that they are over 18, if they do so then it's on them whatever payment method they're using.
At least with bitcoin your wife can't check your statements
haha we cant say that it is anonymous but it is safer than paypal it cant be track we can say that he she is shy that he bought that kind of stuff but also because of fast transaction and low fees? 
