I noticed mainly outside of bengal and all over India, peoples have a concept that Bengalis are doing Jadu tona(Black Magic). Its painful because Balck magic and Tantra sadhona is totally different. Good tantra sadhak never use the negative things for other’s harm. But nowadays so called Baba’s giving advertisment that they can do anything miracle for others rather can’t change their own destiny. Now people uses that word Tantric for their purpose of living, the word Tantric means who created Tantra, on that basis the lord Shiva is the founder of tantra, and considered Buddha as one of his main stream Mahayana means practiced the path to enlightenment and Moksha (free from rebirth) so we consider Buddha as the greatest Tantric but nowadays all others people are mainly tantra Sadhak not considered as Tantric. Foreigners also uses tantra in the process of eroticism. Unfortunately one of a famous Hotel brand also named as Tantra, a place of entertainment.
Basically this is a practices towards enlightenment and self realisation. Commonly (5M kar theory) explains this practice describing the 5 elements of the tantra
1. Madya (alchohol)
2. Mansha(meat)
3. Matsya (fish)
4. Mudra, and
5. Maithun(sex) are the five most important element is this practice.
1. Madya- Definitely people thinks negetive about this unknownly that means this practice is doing vulgarity. Now friends I try to explain it, Now a days for publicity maximum people know about the Muladhar Chakra, (the place of kali presenting where) by meditation we need to be enlightened by the secretion of fluid from the body as described, starting from the bulb (kanda) the place in which the subtle channels (nadi) originate located between anus and penis,the 3 principal channels are Ida(left), pingala(right) and susumna(in the centre of the spine and the head) inside the susumna is the citra a channel connecting to the place at the top of the skull called The Bramharandhra by yoga and meditation.
2. Mansha- (Speech and greediness) If you control this then you will easily enjoy calm and peace as all the rishi and sadhak used to speak less maintaining moun(silent).
3. Matsya (proudness, cruelity,Jealousies,envy) Inside our Ida and Pingala through Inhaling and outhaling there are air floating as fish, processing the controling of Air breath is called success in Matsya sadhana which gives us a healthy long life .
4. Mudra- (Wish, trust, greediness,Anger, culture of others, fear, dishearten, this are very danger for ourself, so control over all this is called mudra sadhana.
5. Maithun(sex)- Inside the sushanma nadi the controling of Air is called Maithun, one can practice this process by doing yoga and meditation.
Your soul will be free from rebirth as mainly this is the 5M kar sadhana(theory). But again this is almost impossible for a normal person to attain moksha so now a days other substitute are explained to normal people which are totally fake ultimately knowing own and the Supreme is the main objective to attain Moksha.