A Cure for Drowsiness

Sitting on the couch,
I know I can fall asleep
sitting with my head
tipped against any cushion,
and I do not want
to struggle to my feet
to find my way to bed.

But once under the covers,
I no longer feel sleepy
as I toss about seeking
a more comfortable position.

I don't know if it's the cold
air from the walk back,
or the sharp mint tang
from the toothpaste,
or just a trick of the lights,
but I should investigate
this cure for drowsiness.