Ah, there is justice in the natural world afterall.

Brian Langerhans of Washington University Arts & Sciences has a fascination with male Mosquitofish genitalia. (The Green Man is not sure whether this classifies as an Art or a Science but, for the sake of maintaining some decorum, he will assume it is a scientific interest.)

Anyway it transpires that female Mosquitofish have a decided preference for male Mosquitofish that are, shall we say, "well hung", although it is not clear whether, in an aquatic environment "floating" might not be a better term than "hanging". What ever, female Mosquitofish go for male Mosquitofish that have a large one.

Casting your eye to the photo of fish in question you will note a certain streamlining of body shape. This is fundamentally disrupted by being well equiped in the genital department. Consquently the size of their organ slows them down, making them ripe for consumption by larger fish. It seems that, in the natural world, well equipped male Mosquitofish get a lot of sex but only briefly before they are eaten.

I think there is a lesson for us all in that.

Read more here.