[Rasklad]

This is prohibited for monks, and I would assume for nuns as well. I have only looked at the vows for monks, but this would be constitute breaking a monastic vow. Actually, if you read the vinaya or the monastic vows, you will find that many of them are aimed at lessening desire in monks and keeping them out of potentially "dangerous situations" in this context, to help overcome what is actually one of the biggest obstacles for male monastic practitioners- sexual desire.

As an aside, even for laypeople, in some practices and systems it is quite advantageous for males to retain these "life essences" while working with the subtle body during certain meditation practices.

Terma