For example, when discussing gender-related problems, [edit] one solution may be generally better for men, while another solution may be generally better for women

Love is war.

All is fair in love and war.

Individually optimal behavior by each male doing what is best for himself, and each female doing what is best for herself, is unlikely to be optimal as for males and females as a whole, or even particular male/female couples.

Such prisoners dilemma problems are normally solved by coercion - chastity imposed on females, shotgun marriages and continued material support imposed on males.

However, I am fairly sure that were I to discuss the usual solutions in detail, the response would be strikingly lacking in rationality.