I think that everyone can agree that masturbation is perfectly normal.
I believe that women do tend to think that men masturbate because there is something lacking in a relationship. Nothing could be further from the truth.
The thoughts men have of their sexual exploits usually lead them to becoming horny at any time of the day regardless of their current relationships.
Which leads me to the subject of the young girls.
I too look at picturesd of young women nude. Not porongraphy per se, but nude younger women. It reminds me of my first times with a girl and my exploits when I was younger.
Most of the stories on this site are of people's first experiences. To say that thoughts of sexual activity when you were young are O.K., but that pictures that illustrate the same time in your life are not, seems very contradicting if not hypocritical.
I don't condone 'kiddie' porn at all, but a picture of a nude girl bringing back memories seems to me to be a very natural curiosity.