"Pornography" is generally defined as pictures of genitalia, or writing intended solely to arouse. The legal definitions are all over the map, depending on where you live. (For example, a picture of a soft penis may not be considered pornography.) If it doesn't show genitalia, it probably wouldn't legally qualify as porn. But I AM NOT AN ATTORNEY.
In my eyes something is only 'porn' if it is extreme or degrading. A lot of 'sexually related stuff' is harmless.