Takes

Salt water in the ocean is created by fish semen

It's brackish because that's where all the fish come. So when a fish jizzes... all that jizz has to go somewhere, and it just goes in the water and makes salt water.

Breaking up with a long-term girlfriend for a year to 'experience things' will definitely result in getting back together

Or just tell her that you joined the military and then just leave town. Yeah, for three years. Write a couple postcards. Come back. If she cheated on you, she's a scumbag. Yeah, that's actually a very good way to tell how serious she is about this relationship. Make up a deployment.