Why does Gender equality stop at Sexuality?

If the West really so believes in equality between the genders, so much so that there is no difference between the male and female genders, and that they're all the same... then why does this equality stop at sexuality and marriage... heterosexuality is also a gender role for men, and if the man is free to break all his gender roles, then why can't he break this gender role and pick a man for a sexual bond, without having to be someone 'different'. If a woman doesn't become 'different' for her freedom to do strip search of male prisoners or a man doesn't become different for cooking or for wearing unisex clothes, then why should he be segregated as a 'different' male for choosing another male as a partner. Afterall, aren't men and women supposed to be the same?