Getting another Maltese

I own a ten month old Maltese who is deaf, but otherwise a very happy and playful, intelligent little puppy. I would like to get a "brother" or "sister" for him to play with and also for him to follow around to make up for his deafness. Should I get a female or male, and why? And how should I introduce Swinky to his new sibling? Any responses are very much appreciated!!

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