The fight for the recognition of sexual diversity has required 200 years to get their first fruits in legislation. However, once achieved equal rights, we must continue working to get full social equality for the purpose of this equality in rights spread across the globe, stay in time and make a happier humanity. For this, it is necessary to know sexuality in an accurate way and in all its breadth, and that this knowledge flow to strip the opinions of prejudice that humanity drags since the emergence of monotheistic religions, without well knowing the reason. A good way to do it is by compared sexuality. How is sexuality in the rest of the animal kingdom? How is sexuality in other human societies?