@sjw@neckbeard.xyz @matrix Reminder: While pregnancies from sex between first cousins do carry a small risk of birth defects, this risk is often exaggerated.[406] The risk is 5–6% (similar to that of a 40-year-old woman giving birth),[406][407] compared with a baseline risk of 3–4%.[407] The effects of inbreeding depression, while still relatively small compared to other factors (and thus difficult to control for in a scientific experiment), become more noticeable if isolated and maintained for several generations.[408]

(second and third have 0 downsides but many upsides)