Although I agree with the vanity poster that the presentation of homosexuality to young school students is a serious problem, I don't think that's relevant to the zoo situation. That is a question of manners, just as it would be if a heterosexual couple were going at it in such a way as to attract attention from passers-by.
Although this happened, the example was really just a way to start the piece off. You are correct though, it does introduce another issue that is not relevant to what I have to say. Thank you for your input - I will think of another way to start.