Doctor stepping in for a second here and doing his doctor duties. Certain areas of your body (pits, nipples, groin) have a different kind of sweat gland that excretes not just sweat but fats (not to be confused with oil glands that are damn everywhere on your body). Regular sweat glands are like PBR or Steel Reserve…

I own that same tie. This is normally where I’d say its a killer look but... you know. Self-evident apparently.