Well I caught onto porn thanks to my parents. I would go on the computer and find stuff but the um 'joy' of porn didn't hi time until I was actually 18 and I visited my very first Porn Shop. Never knew there was one so close to me, the amazing Kansas City is to thank! So anyway when you first walk in all you see is dildos, vibrators, and movies. then if you happen to look both ways you see sexy clothes and novelty straws, cards, and misc party items.
The only problem with most porn shops is they don't have a lot of videos that are for women unless you like gay porn, and the magazine rack is full of naked girls so I guess it's safe to say girls have to find out on their own unless they ask questions. I always asked questions. My mom found it annoying but she answered them none the less.