Based on online definition:
|Look at these spiritual beings!|
"Tantra is a Sanskrit word that means 'woven together.' Hindu and Buddhist meditation practitioners use sexual union as a metaphor for weaving together the physical and the spiritual: weaving man to woman, and humanity to the divine. The purpose is to become one with God."
Oh please, give me a break! Admit it, it's just physical! There might be some emotional and spiritual touch but, sex is sex. I think the spiritual part that was put in this kind of practice is far fetched, and it only shows humans' lack of confidence in pursuing physical pleasure.
And I think there's tons of other ways to pursue our mental/spiritual needs. Non-sexual meditation can be at least one example. And I do think sexual activities is the last one on the list.
Am I miss something?