Using Sex as a Vehicle for Enlightenment - The Art of Tantric Sex

[Sparkist]

I'd love to see a video on this subject. 

What is Tantric Sex?

The history of Tantric Sex. 

How can it be used for Personal Development?

How can it be used for Relationship Development?

Can it be a fix for a relationship on the rocks?

Can it facilitate your connection to spirituality? And how?

Can it be used as a solo experience? Tantric masturbation?!

How to start? How to learn? Can anyone do it? How do you know if you've had it in the past?