Crossword puzzle clue "they might make you scratch your head"

They might make you scratch your head

Sounds you might make when I say "Would you rather watch your parents have sex or have your parents watch you have sex?"

"You scratch my ___ and I'll scratch yours"

"You scratch my back and I'll scratch yours" philosophy

They're gonna do what they do so just turn your head away and hold your palm out

You might rate them on their route and they might rate you on you vomited everywhere

"I want you to think of one of your parents ... Concentrate now ... Create an image in your head ... The parent you are thinking of is ___"

He said "If you wish to make an apple pie from scratch, you must first invent the universe"