Maharishi Vatsyayan has stated in his magnum opus "Kamasutra" that ....Sex is:
"Duty", if done with your Wife.
"Art", if done with your Lover.
"Education", if done with a Virgin.
"Business Transaction", if done with a Prostitute.
"Social Work", if done with a Divorcee.
"Charity", if done with a Widow and
"Meditative Trance", if done by yourself.
so one have his own interpretation on what it is ...
