What's the nicest way to tell someone that they are musty?

Are you still referring to the woman you were supposed to have sex with the other day but smelled like ass? 🤔

I always just ask them if they're going to shower. Not in a rude way just like a casual question.

"hey man I gotta tell you about this amazing deodorant I just bought!" 😂😁

"Oh, btw, did you know that you smell like moldy cardboard in a damp cellar?"

Yo, take a shower, you’re
making the dog fart uncontrollably.

Whats musty....????

Do you use washing powder that smells of damp clothes?

How about, YOU SMELL LIKE MY BISCUIT TIN.

The nicest way:

You: Are you wearing cologne?
Guy: Uh, no, why?
You: It doesn't smell good man
(follow by suggestion of what you think he should try)