Apparently

[kiya]

The mysterious lightswitch in my bedroom that I could not figure out what does controlled the light over the sink.

In the kitchen.

Explanations for why on earth anyone would wire a house this way are encouraged. Plausibility is not required, because duh.

Comments

[redbird]

It's the midnight snack light.

[cakmpls.livejournal.com]

This is my thought, too. Is the light switch in the kitchen far enough away from where one enters the kitchen that one might have trouble finding it in the dark? If so, turn on the light from the bedroom--makes sense to me.

[kiya]

There are three sets of lights in the kitchen other than the one formerly controlled by that switch, all of which have at least one control by any given door.