Pic is short for picture you seem to have missed that point as well. We all know that dick and penis are terms for the same thing. But a dick picture is not a dick, you can like one but not the other!
Ahhh this is a great question. I am 69 now and thinking back (a long time ago lol) Most of us at least in my generation very much like penis. Most young people do get curious about sex. My 12 year old Great Grandson is sneaking to You Tub Porn Hub and anything he can to see a man doing woman and looking at them. actually I believe the answer is it truly depends on the young girl or boy what they like... their sexual desirers and needs. Same as do you like vaginas? kidding
My wife does not like to look at penises, but she has said on several occasions, "I love to feel a hard cock inside me."