plenty of fish in the sea

when i was a teenager i came up with an extension to the rather clichéd metaphor of fish as lovers:

there are two basic approaches to catching a particular kind of fish. the first is to develop a specific technique, tailored to the fish you are after; a lure that is particularly attractive to that fish or a method of fishing that relies on specific knowledge of the behaviour of that fish to maximise the chances of catching one.

the other approach is to drag a giant drift-net throughout the world's oceans, and throw away all the fish you don't like.