If Albert Einstein, Charles Darwin, Edgar Allen Poe and Vincent D'Onofrio's ex-wife can do it – I'm not sure. Never mind. I can't say I endorse first cousin marriages. But many are fine with it. You can study about it within this Mental Floss video, \”31 Kissing Cousins.\”

Also, remind me sometime to let you know about my super weird crush on Vincent D'Onofrio. This video just brought to mind it.