Too lazy to shave.

This is the ultimate lazy blip. There are a number of reasons for this.
1) I am naturally lazy.
2) I am in recovery mode after last week.
3) From time to time I grow a beard, it seems like a good idea.
However Mrs J will give me a hard time, so a shave will become an easy option.
Question.... why is designer stubble OK on young men, but on oldies like me it looks a mess?