I didn't really know what marriage was, so, while the humans were gone, I looked it up in the dictionary: 
Main Entry: mar·riage 
Pronunciation: 'mer-ij, 'ma-rij 
Function: noun 
Etymology: Middle English mariage, from Anglo-French, from marier to marry 
1 a (1) : the state of being united to a person of the opposite sex as husband or wife in a consensual and contractual relationship recognized by law (2) : the state of being united to a person of the same sex in a relationship like that of a traditional marriage 
b : the mutual relation of married persons : WEDLOCK 
c : the institution whereby individuals are joined in a marriage 
2 : an act of marrying or the rite by which the married status is effected; especially : the wedding ceremony and attendant festivities or formalities 
3 : an intimate or close union 
  
Apparently this is only a person thing. Cats don't get married. From my understanding, some animals "mate for life," but they are usually birds (which should be eaten.) 
  
What if 
I wanted to get married? -- Whatever... 
  
Sorry I have been silent for a while, Mr. & Mrs. Human took my computer with them to the wedding.