Final answer:
Tomassi believes that self-deprecation is detrimental for men when interacting with women because it portrays them as weak and lacking confidence.
Step-by-step explanation:
Tomassi believes that self-deprecation is the kiss of death for men when interacting with women because it conveys a lack of confidence and portrays them as weak. This belief is influenced by societal norms and expectations, where men are expected to be assertive and self-assured. By engaging in self-deprecating behavior, men undermine their own desirability and attractiveness in the eyes of women.