((((((Tim)))))),
You are NOT stupid; you're forgetful. There are TONS of forgetfuls out here. That's why G-d invented the TIMER.
I get involved in my 'puter or in watching TV or in reading and forget.
So ... I've learned to provides CLUES for myself. Whenever I turn the stove on, I always put the light over top of the stove on so that I don't forget.
Whenever I do the laundry downstairs, I use the timer so that the property manager doesn't throw my laundry out
If I had a bathtub, I would do the same thing. Set the timer for the length of time it takes to fill. I wish I had a bathtub; I hate showers.
Don't call yourself 'stupid'. You're like a lot of other critters in the world -- you made a puddle (my cat sometimes makes puddles). No big deal. Clean up the puddle. If you caused damage for other people, reimburse them. You've just learned a "hands-on" lesson.
I recently had the lady upstairs washing her balcony to get rid of cat urine. She threw the bleach water over the balcony rail onto my balcony and into my face

I had to call the cops on her TWICE for doing this. I'd rather have **YOU** as a neighbor than her -- believe me.
Hugs.
Barb
PS: Did I ever tell you about the time I ran out of dishwasher liquid and used hand dishwashing liquid instead?? I had BUBBLES -- millions and millions of bubbles. I was using a dustpan and a squeegee to get it up until I figured I was overwhelmed. The night security guard got out the wet-dry vac and cleaned my whole kitchen floor for me (at 2AM) -- that guy was a miracle