Crossword puzzle clue "you might say one two into one"

You might say "one, two" into one

Baffles (ABOUT THIS PUZZLE: If you saw the headline "Fiend Found!" you might instantly notice that, between the two words, only the vowels change — the consonants stay put. Okay, if you were me, you'

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

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

What you might say after your coworker says he's into sex swings

You might dig them if you're into underground stuff

Whence the line "Into the eternal darkness; into fire and into ice"

You might have one to visit Japan, but you'll need a bunch once you get there