"Your diet is too spicy; try eating bland foods and maybe you'll masturbate less, SINNER!"

https://piefed.social/c/historymemes/p/1978410/your-diet-is-too-spicy-try-eating-bland-foods-and-maybe-you-ll-masturbate-less-sinner

I wonder if they still sell the honey and nut variant of corn flakes, Thats probably was my favourite version.

These ones? Crunchy Nut Corn Flakes (wiki link)

They’re still very common in the UK. No idea about anywhere else.

Crunchy Nut - Wikipedia

This is crack to me. I can’t have it in the house.
“The trouble is, they taste too good” was actually intended as a safety warning, rather than an advertising catchphrase.