Where do Geminis like to be kissed?

I'm curious to know, in the realm of astrology and personal preferences, where do individuals born under the sign of Gemini tend to favor being kissed? Is there a particular spot or spots on the body that they seem to enjoy the most, according to the traits and characteristics commonly associated with this airy and adaptable zodiac sign? Or does it vary greatly from person to person, regardless of their astrological birth chart?