re: Why does my well water smell like shite?

It is sulfur. You've hit a point in the water table or something changed in the well that has introduced sulfur into it. In the old days they would just start using the water on a garden and such or just cap it and forget it. The well at what used to be my grandmother's place is sulfur water. That well is still there, technically, but hasn't been used in 50+ years.

Now, it is easier to deal with, though. Google "How to remove sulfur from well water". There are various ways.