I actually do think that homosexuality is normal. I have said this in another post, that in the year gay marriages were legalised, 30000 couples have married. That means 60000 individuals....and they are just the ones that chose to marry. The problem people have with homosexuality, especially of gay men, is the thought of 'what they do in the bedroom,' and it sickens alot of straight men to their very core. However, it is only one aspect of their life, it does not infringe onto whether they are kind, respectful, hardworking etc etc. There are many 'straight' people who have sickening depravities in the secrecy of thier own homes...I'm sure they could be found in a swift google minute.
As for the animal kingdom, yes, the male sheep is a prolific gay, so much so, that it has been 'kept quiet' until recently!!!!!!!!!!!! Growing up, we had horses and one of them 'William' would think nothing of mounting any of the other geldings, should they get too near.
Perhaps it is the world that needs to open their eyes to what is actually out there, not just what we actually want to believe because of our sensibilities!