Real Tantra is not what Rion and Etienne made of it and it's
definitely not squeezing your pipi to Thai music videos
here is a great artical about Tantra:
http://viewonbuddhism.org/tantra_practice.html
SEXUALITY IN TANTRA
What is usually overlooked is that sexual practices in tantra should be free from the ordinary desires and lust, and only very advanced practitioners should try these practices after permission from their teachers.
edit:
the thing about 'permission from their teachers' is because playing with sexual energy without the proper training could be dangerous.....