the use of conditioner has nothing to do with gender, it's all to do with your hair type and style. if you have long hair, then you need conditioner. if your hair dries out easily and gets crunchy, then conditioner is recommended. conditioner is just vitamins for your hair. I use conditioner on occasion because my hair is long and fine, and because of the fine texture, too much moisture makes my hair look greasy, but if I were to NEVER use conditioner, my hair would have much more breakage.
I'm training in hairdressing at the moment, so I know a bit about it. Using conditioner evens out the pH balance of your hair/scalp after using shampoo, which makes hair healthier and less likely to get damaged. Its defiantly advisable to use conditioner, no matter what your gender.
If you have a crew cut, it doesn't mater much, but if you have longer hair, then you should. It's not a "women" thing; hair is hair, independent of gender. If you hair is in a bad state, I reckon ladies will notice that and think you don't look after yourself. Not a good thing. Apart from that it's really no big deal, it's not like some face mask you have to keep on for 10 minutes or something. Wash your hair, put the conditioner on, wash (and maybe shave), rinse everything, done.