All Beliefs are Welcome Here!
Sex builds up your magical energy and spirit in a very strong way, as well as intensifying your emotions. And as most people know.. emotions can be an extremely powerful factor when performing any craft, if channeled right.
Of course there are those who also try and use magick as a means to sex... ((i.e. using a spell to make someone lust for you)) is also sometimes categorized as "sex magick".
When you make babies :D LOL