Mir

Tldl; Two arguments: a. People have a right to privacy and sexual orientation falls within that ambit, it does not infringe on the rights of others. Social, moral (moral wrt individual choices on morality which don't affect others substantially) norms can't be imposed on citizens by the state as it infringes on personal liberty, freedom of expression. (How did we arrive at these rights is more complicated. we'd have to consider theories on formation of State and the source of its power). b. sexual orientation is not based on choice and hence unfair to discriminate based on it. (no culpability). - Hypothetically if gene editing/any other tech allows people to choose their sexual orientation this argument would become weak. hence we must rely on argument (a).