Tantric question

Can someone expand my knowledge on what is considered Tantric Sex? Is is just making the sex/foreplay/intercourse last for a long long time? Or does it include certain techniques and positions and acts?
So from reading your link, it would seem that the Tantric side of things is the prolonging of pleasure, can be for him, can be for her, and can be for both. Love the idea. Wish my wife would get more into it.