Remember the most interesting and amazing event of Hindu Mythology, i.e., Samudra Manthan which was performed by the common efforts of Devatas and Asuras. It was specially done to get nectar of immortality. When the Devatas and Asuras succeeded to achieve it, they, according to their deal, were to share it among them. As per the plan made previously by Devatas, Lord Vishnu appeared in the form of the most beautiful girl namely Mohini. She was so attractive enough to manipulate the attention of Asuras and then Devatas alone had the nectar of immortality. Finally they became immortal.
Now you may have understood how the Mohini Mantra began. The concept of Mohini Mantra is exactly came from Mohini, the incarnation of Lord Vishnu. After this event, scholars learnt how to attract people psychologically and spiritually to meet their needs. Eventually the science of Mohini Mantra began.
Disclaimer: This article does not support that there is existence of Mohini Mantra. National Discovery Channel openly fight against the superstitious beliefs like Tantra, Mantra and Yantra. This article has been created only for the reference.
Discovered by +Don Prince