The malcubi are demons from hell that consume people's souls during the act of intercourse. They have lived on earth since the days of early Mesopotamia, devouring men to feed their hunger and sustain themselves. In myths of the malcubi, they secrete a powerful hormone that acts as an aphrodisiac to attract victims. However, the truth is that they use a form of mental manipulation called "glamour" on their targets, making feeding easier. The spell flows into the body's aura where it then radiates its intent outwards to other minds within a certain radius. It is a mixture of magic and hypnotic suggestion, and is a permanent part of the creature's biology.
I need to design this glamour in a way that allows this creature to hunt, while fulfilling certain parameters. All onlookers should see their idealized vision of the perfect mate, which would be different for everyone. Even if they consciously don't know what that is, their subconscious desires must be met in that vision. However, this creature must be able to operate in public and avoid suspicion from society or perceptive individuals.
How can I make this happen?