Crossword puzzle clue "watch lights briefly"

Watch lights, briefly

Good place to watch the northern lights

What watch watchers watch

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

Girl-watch or boy-watch

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?"

Legal runners of red lights, briefly

Some streaking lights, briefly