Why do only women take birth control?

Why is it that all birth control is only for women? With the exception of the male vasectomy and condom, all chemical birth control is made for women. Has anyone ever wondered why there aren’t a whole bunch of birth control pills, patches, injections, and implants for men? Seems kind of unfair to me. Why are we always the guinea pigs for pregnancy prevention? We take all these health risks and what are men doing for the cause? Maybe we should be putting more thought into this?