I found a box of books in the attic of a new house at age 12, the summer of 1963. It contained 2 sf anthologies. One was Damon Knight stories.
The other one was a hard bound collection of multiple stories by multiple authors with many different themes. The (not Damon Knight) story I recently remembered involved a pathetic guy (with blond roots) who has been trying to seduce a beautiful non-stereotypical blond. She demonstrates, in the last paragraph, a "trick" that causes a fire poker to suddenly sag.
I didn't get at age 12, but when something reminded me of the scene a while back I did and started laughing out loud.
It probably would have been funniest when I was a high school sophomore, but I would like to see if I can locate the story and maybe even the anthology.
Ah, retirement. I think the was yellow.