it's not about women as a class, but about forming a deep connection to someone (regardless of gender or it being a romantic connection or not). when you have a bad experience like divorce or a breakup or a "betrayal" of a friend who you trusted but who decided to unfriend you over some issue, then that can lead to loosing trust.

it takes a new relationship to overcome this and that's difficult when past experience hampers your very ability to form that relationship.