1. your bf/gf is unlikely to be staying over
2. you probably had a really crap dinner
3. nothing happens on the internet on sunday
4. you feel obliged to bore yourself to sleep because you have work in the morning
5. i once got really shitfaced on a sunday
6. and took acid
7. then when i went to work the first thing i said was "oh no i'm still high on acid"
8. at least i'm not doing that tonight