Assertiveness may simply be defined as the ability or capability to make relevant decisions and voice them clearly without any fear; non-assertiveness is the lack of these skills. A non-assertive woman may be described as polite, timid, conservative or subordinate. A non-assertive man on the other hand may be described as weak, a doormat, indecisive or undependable.
The difference in the above adjectives is because of conditioning by the society. Women are considered the weaker sex and are supposed to speak only when necessary hence we can tolerate non-assertive women. However, men are the leaders and heads of homes and primary decision makers. A non-assertive man is considered a disgrace and mockery to the male gender.