Oh come on, they can make pills, injections, inserts, and implants that cause my cervix to become thicker or my uterine lining to slough off or my ovaries to not release an egg or to trick my body into thinking it's pregnant when it isn't and change my hormone production but they can't develop a pill that inhibits the production or changes the nature of semen? Seriously? I just think there hasn't been as much research into it. Why bother? Let women deal with it. Men might suffer some consequences? Oh horrors. And while we are on the subject, why is Viagra covered by virtually every insurance company in this country but the birth control pill isn't? What's that all about?
Unfortunately, there isn't just a hormone or two that controls semen production. Its not that easy. And if you think we don't want that shit to protect us from crazy fucking women, you couldn't be more wrong.