Part of the problem is that men frequently misconstrue a women's natural instinct for being social and friendly as a sexual overture, usually this is because they're so used to other men being so unfriendly.
Part of the problem is thinking that women have a natural instinct for being social and friendly. Attributing characteristics stereotypically associated with a particular gender to "natural instincts" is part of why women get such a bad rap in technical fields.
