If he prefers black underwear, your man is cautious, steadfast, willing to take risks, and dislikes changes in life.
If he likes dark blue, he is rational and always knows how to choose the optimal solutions, which is why reason often overrides emotion.
If he likes dark brown, he is enthusiastic, active, and readily accepts change.
If your husband prefers white underwear, he is a dreamer who sets goals for life, always has rich ideas, and is sought out by many for advice. But be careful, he is very prone to jealousy.
If he likes teal/petrol blue, your husband is clearly quite ambitious regarding status, always has some plan in his head, but his perfectionism often leaves him feeling uneasy.
If he prefers maroon/plum color, he is intelligent and independent, patient, faithful, but perhaps a little selfish.
If your man likes grey, he is honest, quick-witted, creative, and you can completely rely on him.
If he prefers thin and tight underwear, he is a flirt, enjoys showing off, and might also be a little "flamboyant".