Crossword puzzle clue "what i and j have in common"

Actor who said "Some people have youth, some have beauty—I have menace"

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

Houses with sharply angled roofs, and what this puzzle's four longest answers literally have in common

Dentist's concern, and a hint to what the longest answers have in common

What "i" and "j" have in common

What Nixon and Kennedy have in common?

What Bex and Dax have in common

Inaccurate information, and what the starred answers have in common