I would suggest that you could have 10 homosexuals and there may be 10 different etiologies of how they came to be. Separate, dichotomous, or various points along the continuum. Furthermore I don't think that it matters. Genetic, genetic predisposition, birth order, hormones, choice, nature/nurture.....when it comes down to it, does it really matter the hows and whys? Say that at some point there was a test developed to determine if one was "homosexual". What if a person who "flunked" or "passed" the test as not being homosexual still preferred the company of same sex partners, would they be ostracized and set up for special attention? Gets tricky fast.
People in power have always used/misused religion to control segments of the population. I don't see that changing anytime soon.
As far as dogs go, my take is that it isn't the breed so much as the individual dog. For the past 36 years I have vacillated between being owned by GSD or Rottweilers (Sometimes both at the same time) with many several mixed breeds from the shelter thrown in the mix. Rottweilers have the strongest bite on record although can be some of the most mellow and reliable dogs to own. Much like Pit Bulls or any other breed of dog. My current Rott (Thor) and my previous Rott (Thor) both worked as therapy dogs in different hospitals I worked at. Both are Schutzhund III as well.
Raising them correctly, emphasis on socialization, always positive teaching/training, probably had more impact on their behavior than anything they may have been bred for in the past.
Interestingly, the more humans interfere in the breeding of dogs, the unhealthier said breed becomes.