In our society, we are free to talk about sex in a frank and open manner. And this is generally a good thing. In Buddhism, it is advised that one not participate in "sexual misconduct" But it does not specify what exactly qualifies for misconduct. Buddhism does not advocate abstinance or promiscuity and the rules for monks and regular Buddhists are different.
Monks, who must hold themselves to a higher standard, can not have sex with a male or female, or he will be disrobed. Any sex act that he engages in will result in suspension.
For the lay Buddhist, there is nothing inherently evil about sex and there is no reason to feel guilty after having sex. But one should hae a healthy respect for sex, refraining from addiction. Buddhists should find a healthy balance between puritanism and sluttiness. Having done that then safe, consentual sex is not a wrong action.
There is difficulty, however, in applying the principles of detachment to sex. (Think about that next time you orgasm) To the Buddhist, sex is neither good or bad, it just is.
