Yes, I’ve been asking this question for years. And why isn’t a violation of the equal protection clause of the 14th Amendment. Women should have to sign up just like 18 year old males. And why isn’t this question ever asked in a debate.
That would be because they have run into two liberal issues that oppose each other.
Issue one, women should be allowed to everything men do, to include military combat operations.
Issue two, the draft is bad, "If the draft returns, I'm heading to Canada."
Hilarity ensues.