Erotic pictures, videos, literature, etc. It is the greatest thing on God's earth givin to man. Some people try to say they never watch it or only lonley guys without girlfriends watch it but they are all lying. Every normal man, straight or gay, watches it at least once in a while. No one is to busy fucking all the time to watch porn. There is those who watch an excessive amount though and they often are strange creeps prone to child molestatin.
As Bill Hicks once said "any material devoid of content that induces sexual thoughts. So every advertising campaign on TV. When I'm watching that double-mint commercial 'double the pleasure - double the fun' with those twins; I'm not thinking about gum, that's for fucking sure"
When two people love each other very much the female tends to spread her legs while naked and the male is naked between them and puts his penis in her vaginas. This act is called sex and porn is when sex is recorded and posted online!