Male, thought there would be far less problems with hygiene issues 

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I've heard that too, that females bond more with men, and males bond more with females. I don't know if this is true or it. I also heard that a male and a female will get along better than two males, or two females, because two males will fight for dominance, and two females can be jealous of each other.
I have male and female in the same dog.