Aliasing male_genetalia -> penis.

Reason: same thing

Does this also applies to balls/nuts to?

Not the toys/what squirrels eats you sillys.

The tag shouldn't apply to anything.
We have tags for balls and penis, we don't need a male_ genitalia tag at all.

I agree with that.
Too generic, other ones should be used instead. But should be aliased to invalid_tag, not to penis.