Not-So-Deep Thought for the Day

Why is it that all the comments to my posts appear in the mornings?
Is it something about the refreshing effect of a good night's sleep on my dear readers or the busy requirements of afternoons and evenings? Or is it that the most eager writers read in the mornings? Or am I especially obtuse/wrong/exciting in the mornings and the reverse later on in the day?

This may be one of those eternal mysteries, like the reason why I can't learn to tie my shoelaces however hard I try. And it's probably of equal interest to anyone else. But you could add your own eternal mysteries if you like.