You can't reason anyone out of a position they didn't reason themselves into in the first place.
And if showing up to tea wearing pink pumps wasn't enough... since the Barbie playhouse only has one bathroom and nature calls, she caught Ken shaving his legs while taking a bubble bath.
I think the relationship is doomed. If only they had given Ken some genitila from the beginning, all this gender confusion could have been avoided.
And here I thought Ken aged and went into politics to become the current Speaker of the House.