[Amnorix]

Usually hard-core science types aren't good at subtle hints, and aren't good at self-awareness.

So if he's typical of that breed, then I'd go something like this.


"As you probably know personal appearance and presentation is important when it comes to getting a job. I'm only going to tell you about this because it may help you, because I personally don't care -- BUT it can't really help that you have dragonbreath as often as not. Maybe you don't even know it, but whatever -- that isn't going to impress whoever is interviewing you. You might even look into those stupid white strips or something to help whiten teeth as well. Can't hurt and do what you want, but figured I'd try to help."


And if he's a typical science guy, then he's about as sensitive as a rock, and won't be insulted, but rather will factor that into his planning for the next interview.

But yeah, alot of this runs off your own understanding of your relationship with him and his personality.