they should be marked 'adult content'
Forgive me here guys. I am as much a "Perv" as any "old man." However, old guys in particular, and any guys in general posting pictures of their genitals on EP or using them as your avatar is really over the top and inappropriate.
Women, correct me if I am wrong, but generally speaking you just don't want to look at photos of random penises belonging to strangers and most especially wrinkled, old, flaccid ones. Guys, if a woman wants a photo of your Johnson, I suspect she will let you know and share her private email address so you can send her a full body shot to go with the penis.