Women are often penalized for not being "nice" in the workplace as well. It may happen in the hiring process or show up later in performance reviews. It is a delicate dance of negotiating, being strong and being "non-threatening."
I would presume no negotiation tactic has a perfect 0% or 100% success rate for any given gender expression, but I am curious about the relative rates for them and how this can best benefit all related parties.
You're injecting a whole lot of assumption on how these negotiations are happening.
"Please give me a raise" is not a negotiation. To negotiate properly you need a trump card, "please give me a raise" doesn't show one.
I deserve a raise because...3 reasons. I have accomplished xyz and want a raise.
In my younger years I said I wanted a raise of 20 percent immediately after telling my manager that I told a coworker "to go fuck himself" twice.