Moth-Brained

When a person has moths flying around in their brains, laying eggs in all the old things in their lives and clouding the lights with their bodies and egg sacks causing them to be dim-witted, lazy and unable to see clearly.

Mark is so moth-brained that when we had an actual infestation of pantry moths, rather than throwing out the food where they lay their eggs, he moved it to the other pantry. The pantry is not the problem mark, you are.

moth brain

Someone who enjoys fireworks. Like moths, these people are easily distracted by lights and oblivious to the downsides of fireworks, like the pollution of streets and the air, its negative effects on wildlife as well as pets and the trigger potential for people with PTSD, namely veterans.

A: But it's so pretty, don't you enjoy the lights??
B: What a moth brain...