My second favorite household chore is ironing. My first being, hitting my head on the top bunk bed until I faint.
-Erma Bombeck
What does "hitting my head on the top bunk bed" mean? I laughed when I first read it, because I thought I read "hitting my head on the bed headboard" and that it had a sex connotation. But "top bunk bed"?

P.S.: English is not my mother tongue
-Erma Bombeck
What does "hitting my head on the top bunk bed" mean? I laughed when I first read it, because I thought I read "hitting my head on the bed headboard" and that it had a sex connotation. But "top bunk bed"?
P.S.: English is not my mother tongue