Though there are practices in Tantra where Yoni (females genital organ) and Male organ is worshipped and copulation is also practiced,one should know these practices do not have the sanction of the Vedas.
2.These practices are called Vaamachaara,the left handed path and are set aside by Acharyas like Adi Shankaracharya.
3. In practices indulged by one, he is beyond sensual pleasure and performs these acts with total detachment,fixing mind on Reality.This is a rare case.
The Vibrations must suit the vibrations of the individual.
For instance my Family Deity is Subrahmanya, Palani Dhandayuthapani.
But one of the most powerful Mantras of Subrahmanya in Tamil, Kanda Shasti Kavacha does not suit me.