During my lost summer of 86 when I was separated and single I dated a squirter for a while. After the initial wow factor wore off we kinda experimented with whole thing. She was as perplexed as me. (this was way before porn made it such a "thing".) The amount of squirt was in direct proportion to how much she had or hadn't peed right before sex. If she took a good long hard piss right before there was basically nothing. And really, all you need to do is not wash the sheets afterwards. After a day or so later the pee stench is unmistakeable.