Why do women wear makeup and perfume?
Because they’re ugly and they stink.
Or you could get arrested, according to Wear It, Bitch:
One of the highest courts in the land, the 9th Circuit Court of Appeals, has determined that it’s legal for an employer to fire a female employee who refuses to wear makeup. Think this through slowly and carefully, girls: if you live in the 9th Circuit (which covers California, Washington, Oregon, Nevada, Arizona, Idaho and Montana), you could be fired tomorrow if your boss decides your “uniform” for work includes makeup.