Maharishi --------- 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
"Meditative Trance", if done by yourself
- So stop feeling guilty, whichever it may be.......... JUST DO IT !