Apparently, physics can't explain why you spill your tea. Maybe its just because your really really really tired?
If you spend your mornings sourly contemplating the tea you spill on your counter - no matter how carefully you pour - you're not alone. Nearly everyone spills a few drops. And despite talented physicists trying to figure it out, no one knows why. Some problems never get solved because they're difficult. Some never get solved because everyone already assumes they know the answer. The mystery of the Teapot Effect remains unsolved for both those reasons. Experiments have been done to determine why some of the tea dribbles down the spout even when the tea is poured expertly, but the experiments haven't been conclusive. More importantly, for a long time, no experiments were done because everyone was sure they knew why their tea got spilled.