It occurs to me that if women can wear "man-tailored" suits and pants, men should be able to wear "woman-tailored" underwear. Let's face it, in Shakespeare's time, the men wore the fancy duds, including
stockings and frills, and the women wore dull gray, long dresses made of wool. It's only a question of fashion. We wear what we wear because of trends, not because it's right or manly or womanly to do so.
All that having been said, I think both men and women should wear what they want so long as it pleases them.