(from "A Feminist Defense of Pornography"; can be found by Googling it; originally included the link but post became dead immediately after submitting and I think that's why.)
"
* It gives a panoramic view of the world's sexual possibilities. This is true even of basic sexual information such as masturbation. It is not uncommon for women to reach adulthood without knowing how to give themselves pleasure.
* It allows women to "safely" experience sexual alternatives and satisfy a healthy sexual curiosity. The world is a dangerous place. By contrast, pornography can be a source of solitary enlightenment.
* It offers the emotional information that comes only from experiencing something either directly or vicariously. It provides us with a sense how it would "feel" to do something. "
I'd think the same would also be true for men.