Im curious... When is the Dimple a MUST on a tie? Does it depend on the fabric? (I dont know that you could apply a dimple on a wool or tweed tie because of its thickness, havent tried it, but would it be a sin? Does it depend on the Knot? To me it looks like the dimple looks great on a Full Windsor, but would it be a sin to apply it to a Four In Hand or something? Does it depend on the occasion? Should I avoid the dimple if im heading to a bar or a more casual/social setting and reserve it for business or more formal settings? What are your thoughts?