A white/light stain left on a man's trousers/pants, usually on the crotch area. This stain may be from
sperm,
cum that is left on there, but may also be a coincidental white stain, from milk, PVA glue, etc.
Sugar stains can also be found on other pieces of clothing or surfaces. If you see a sugar stain on some one, make sure that you bring it to their attention that they have one.
