Murder, rape, theft, lying etc have been going on for eons too but if someone broke into your house, raped your wife/husband and robbed you of your belongings, would you so flippantly endorse it and not call the police using the excuse its 'normal' ( common) behavior?? Because its exactly the same thing. The difference you are not seeing is you are not trying to explain it but defend it. Again, its been pointed out its about integrity, not sexual orientation or lifestyle. You are, in fact, defending deception and lies. Defend that in every other area of society too as well if you want your argument taken seriously. Because you cant speak for everyone's nature as there are people who are monogamous and even prefer it just like polygamy! Geez!