The man waters the plants. The woman comes home five days later to an apartment full of dead plants. No one knows why this happens. If Gloria, Suzanne, Deborah, and Michelle get together for lunch, they will call each other Gloria, Suzanne, Deborah, and Michelle. But if Mike, Dave, Rob, and Jack go out for a brewsky, they will affectionately refer to each other as Bullet-Head, Godzilla, Peanut Brain, and Useless.
Some men look good with mustaches.
Those men are Tom Selleck and Burt Reynolds. There are no women who look good with mustaches. If a man has a friend whose relationship went down the river, he is usually happy that he still has a girlfriend. Happens usually after some befriended women meet for some social cooking and decide after a valuable talk that they should all break up. The next day at least some of their boyfriends are unable to figure out the reason for the breakup.