homosexuality is very natural in many species, with many species changing sexual preference for varying situations and social structures. the female bonobo (and many other primates) for instance mates with female family members to strengthen social bonds but mates with the males for offspring, this is very very common. some species are actually hemaphroditic in a sense and change gender during a certain life stage (many fish species). and you even have some sp. that are Asexual which means they dont need anyone to have offspring and dont have a defined gender (some mosses, amoebas and many more). we have not yet managed to ask many animals to define their sexuality so we still are only scratching the surface. again i reapeat it is very very natural and yes they probably would like some privacy

(just ask them to control themselves when visitors around, shhesh)