Crossword puzzle clue "you can set your watch by it abbr"

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

Like either option in "Would you rather watch a video of your parents having sex or your parents watch a video of you having sex?"

You can set your watch by it: Abbr.

Where you might put your balls before hitting your balls as hard as you can

It helps you watch your balance: Abbr.

You can set your blender on it

Yell at your parents for not making the soup salty enough because your crush told you your mouth looks too funny to kiss, e.g.

Nose, bottom of your foot, that spot you can't reach on your back, e.g.?