Confucius described marriage as "the union of two surnames, in friendship and in love".  In ancient China, some evidence indicates in some cases, two clans had a longstanding arrangement wherein they would only marry members of the other clan. Some men also practiced sororate marriage , that is, a marriage to a former wife's sister or a polygynous marriage to both sisters. This would have the effect of eliminating parallel-cousin marriage as an option, but would leave cross-cousin marriage acceptable.  In the ancient system of the Erya dating from around the third century BC, the words for the two types of cross cousins were identical, with father's brother's children and mother's sister's children both being distinct.  However, whereas it may not have been permissible at that time, marriage with the mother's sister's children also became possible by the third century AD.  Eventually, the mother's sister's children and cross cousins shared one set of terms, with only the father's brother's children retaining a separate set.  This usage remains today, with biao (表) cousins considered "outside" and paternal tang (堂) cousins being of the same house.  In some periods in Chinese history, all cousin marriage was legally prohibited, as law codes dating from the Ming Dynasty attest. However, enforcement proved difficult and by the subsequent Qing Dynasty, the former laws had been restored. 
"Some of the stuff we're working on goes back to the fact that, as good as he is, as talented as he is, there's still a lot more there," Cousins said. "As he continues to fine-tune and understand what we want to do here in our offense, he hopefully can just keep getting better and better. I enjoy playing with him and I take it upon myself to get him the football, give him opportunities. He's so talented, and he has such a good heart and works so hard, I want to make sure he's given a chance to be really successful and have a great year this year."