“Pulling my leg.” Meaning you are making something up/joking at someones expense.

It does not have any real connection to the present. The idiom came about in the mid-19th century. There’s two competing theories about how it came about. The prevailing theory is that pick pockets, particularly child pick pockets, would pull on people legs to distract their mark. The darker theory is that it was related to pulling someone’s legs when they were hanged in order to finish the ordeal if they didn’t die from the initial drop.

People really twist themselves in knots to defend their heros huh?

No. Don’t listen to influencers for food science. Seed oils are not “toxic” like you say. In fact, if you hear someone describing food as “toxic” you can almost guarantee they are a quack.