The real problem with "age of consent" laws is that they grant legitimacy to the concept of femoid agency. Women should not be allowed to marry anyone without the permission of their oldest direct male relative, and sex outside of marriage should be illegal (death penalty for rapists and adulterers).
Furthermore, and relatedly, the concept of "marital rape" is inherently libtarded. Husbands and wives give each other explicit and perpetual "consent" to sexual relations when they make their wedding vows. You can do all sorts of horrible things to your wife deserving of jail time or execution, but by definition you cannot "rape" her. We have a word for the withdrawal of "consent" to sexual relations with your spouse, it's called divorce