Iceland is small. It boasts a population of only 300,000 which leaves the odds of having sex with a relative pretty significant. Now, the Icelanders are building a handy tool to avoid family sex.

Íslendingabók—meaning "book of Icelanders"—is an online incest avoidance search engine. All you have to do is plug in your name and that of a potential mate and the site will search a genealogical database to see how closely you are related.

You might have some overlap many generations back, which in case is probably safe from spawning mutant cyclops kids. But the warning is here: if you share great grandparents, you might just want to reconsider the relationship.

GlobalPost reports that new research says sexing with a distant cousin is beneficial for fertility, as your genes are more compatible than someone from elsewhere. But its still creepy. Incest creepy. Good luck Iceland.

[GlobalPost via TNW]