Seriously. You get mud in odd places, her parents will never really accept you and there's that whole hassle of deciding what religion to raise the kids as. It's just common sense.
But common sense is no match for the power of love, so here's the story of one proud Khajiit who was humbled by his mudcrab love. The video evidence, from Eru Earandel, is series of dreamy shots of our Khajiit staring lovingly into his mudcrab mistress's eyestalks.
You know what, forget what we said before. We are moved by this expression of sincere devotion. We wish these two lovers the best.