I never seem to read the same book twice... I guess it's because I always want to move on to the next one...

the same must be true for code

I think so too; you learn something new everyday and each time you read it you have more knowledge and experience than before, which allows you to see things you hadn't realized before. Moreover, you could be sleepy the first time...

"what was my intention? why did i do this?"

Perhaps you should review your documentation habits O:-)

But already a pause of several days, before revisiting the code, seems to have the beneficial effect of a changed perspective, and I think that is a great benefit to debugging!

It's a great benefit to ourselves.

Note to self: look at my code more often.