I guess I can answer this because I'm getting a little biewer girl..
I've always loved females and it has everything to do with male genitals (no I'm not trying to be sick either). I do not like the idea of testicles on animals. I do not like the idea of "marking" or "spraying". My dog before my yorkies was an american bulldog/pitbull mix and I had him neutered THE minute his testicles dropped. As he matured, he never got that hard feel or look to his winky which made it better (I commited myself to him because of his temperament with people so I wasn't going to throw him out because of his winky
).. But, he did mark and at 110lbs, it was one HECK of a mess to clean up! I have a male cat who I absolutely adore but didn't want because I'm not a cat person and he is a male. I know female cats spray as well.. lol but again, I'm not a cat person.. My girls are more affectionate than my bfs two dogs (who could care less if you paid attention to them) whereas my girls BEG to sit on my lap, beg to sit on the couch with me, or they just plain flat out DIE to be near me.. Which I love..
Hope that made sense.. I kinda bounced all over the place..