First of all it is unnatural for humans, to take on same sex marriage, let alone gay marriage

this is because, anyone who believes in the bible can attest to the fact that when God created the earth, he made them male and female, showing his arrangement for marriage. God is wiser than all humans put together, and his decision is for our best interest.
Secondly those who practice gay marriage often try to change their appearance to that of a woman, something very detestable and inhumane, also it is just a practice that should not even be done cause of its immoral lifestyle. as for me i see every thing bad in it, and detest does who practice it.