Seriously Why..?

But how do you poop?

Well ... I mean don't all mammals have periods ? If they do then mermaid would because they would be mammals
And the hair would only be perfect underwater
And sirens were the one to lure men to their deaths, mermaids were actually a bit ignorant tot the fact that humans couldn't breath underwater and just collected the souls in jars

You had me at no periods

Where's the sign up form??

Not to mention freshest free sashimi forever!

Butt you poop were you sleep and swim.

You get to lure men to their death, but only very few weirdos will have sex with you.