Over the years, I've come to realize, and I am paraphrasing for the sake of brevity: Ugly is as ugly does.
There are drop dead gorgeous people in the world who are selfish, intentionally cruel and even straight up evil. We know this. And we know the opposite is true. You don't have to watch "Shallow Hal" to see that looking beyond a first impresson can lead to rewarding friendships and relationships.
I have also noticed that there can be a huge disconnect between people being considered conventionally attractive, and being sexy. Sex appeal actually has little to do with physical attributes, and everything to do with intelligence, personal magnetism, and confidence.
A third note I would suggest is that it sounds like the dude may be suffering fom depression, rather than "laziness." If he is young (teens/20's) he may not have been taught or encouraged in the myriad of steps involved in personal hygiene, especially if his family was toxic or dysfunctional. Feel him out, see if he's up for a male make-over. Even if he does it in baby-steps, rather than one day, it will make a world of difference in his sense of self-worth.