Saw a joke in a book, i don't understand how it could be funny

[Patrick]

can someone help? was at my friends the other night and he had the book "piano for dummies" on one of the first few pages there was a little comic with a guy at a piano yelling to his wife

"honey, get the ant spray, my b flats are starting to sound like f sharps."

we spent a good 20 minutes trying to figure out what the joke meant, but couldn't. asked a few other people and no one has any idea. its supposed to be a joke but i can't make any sense of it.

[Psycommu]

I don't know anything about music, but perhaps there's ants on his sheet music making b-flat

https://files.facepunch.com/forum/upload/2014/70d504c9-9ff1-46b9-ae09-434d8eb19853/220px-C-flat-major_a-flat-minor.svg.png

look like f-sharp.

https://files.facepunch.com/forum/upload/2014/59fd600e-371a-4cf9-8a6b-2f4d5c37d122/220px-F-sharp-major_d-sharp-minor.svg.png

Because # looks kinda like bug legs and antennae and combined with b, makes it look like it has a head, I think.

[DrVincentWolf]

Oh man I saw the original thread without the image and scratched my head so much trying to figure it out. Marvelous how a simple image can help! Yeah, the ants are crawling all over his notes so that they look wrong.