Women usually pay more for a haircut than men. More to dry clean their clothes. And also more for grooming products like deodorant and razors. The difference in pricing, called gender price discrimination -- is so common many people don’t realize that in some places it’s illegal. “Gender price discrimination is where companies or services charge different rates for no other reason that someone is a man or woman,” says Michael Cone, a partner at the law firm FisherBroyles. Cone is a trade lawyer who’s been studying gender price discrimination for over a decade. There are no federal laws that outlaw this practice but they are policed on the state and local levels. California outlawed the practice in 1996 after a state study found a “gender tax” cost women approximately $1,351 more annually. A quick online search revealed price differences for similar products marketed to women and men. Degree deodorant at Walmart was $3.88 for women, $2.47 for men. Walgreens had a 3-pack of Gillette razors at $11.99 for women and $10.99 for men. And Gap had women paying $69.95 for the same fit of jeans versus $59.95 for men.