Pretty much when your dick smells
like rotten cabbage dipped in microwaved buttermilk ranch because you've been been doin shit all day and you've got one too many folds in your ballsack. The aroma from your gross dick mixes with the smell of your swamp ass to kinda smell exactly
like an old shinguard or when you fuck some dirty slut and
don't wash your hog until after work the next day.