I am a biologist. The only reason you happen to think that ‘straight’ sex is normal is because vertebrates (the species you most commonly see) use this method of sexual reproduction. But in other species, it is far from the norm. Hermaphroditism, Sequential Hermaphroditism, Parthenogenesis, and many other mechanisms exist of reproduction.  So tell me, are earthworms, bees, snails, and frogs “immoral” from your point of view since they don’t ascribe to your narrow interpretation of what “normal” and “moral” is? Were penguins, dolphins, and bonobos influenced by our “culture” when they “decided” to have members that engage in same sex relationships? And since it’s a “decision”, can you recall the time when you “decided” to like males? By your logic, we should have “straight” clubs so that children that have been rejected in their attempts to seek same sex relationships can find a sense of normalcy.