Crossword puzzle clue "restriction on how old you have to be to do something 2 wds"

Restriction on how old you have to be to do something: 2 wds.

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

One may have a height restriction

Complete autonomy you might have over something: 2 wds.

"You must have something better to do!": 3 wds.

What you need in order to be sure you'll have something to put your cream cheese on?

Something you always have with you that can be hard to find?

"South Pacific" song that asks "If you don't have a dream, / How you gonna have a dream come true?"