Not surprisingly, they found that the more you know someone, the more likely you are to be happy to be touched by him or her.

Erogenous zones, however, were out of bounds to all but partners, with one exception.

Men indicated they were comfortable with female strangers touching any part of their body, even their genitals. In fact, a woman they barely know has “touching rights” similar to a parent and more than a sibling, according to the journal Proceedings of the Royal Academy of Sciences.

By comparison, women were only at ease with male strangers touching their hands.