Definition: We would like you to classify each of the following sets of argument pairs (discussing Gay Marriage)  into either SIMILAR or NOT SIMILAR. A pair of arguments is considered SIMILAR if the arguments are about the same FACET (making the same argument), and is considered NOT SIMILAR if they do not have the same FACET. A FACET is a low level issue that often reoccurs in many arguments in support of the author's stance or in attacking the other author's position.
Input: Sent1: For starters, prove to me that gay sex is natural with something more substantial than "it exists in nature", and explain in detail that if in fact it is natural, why is it natural.
 Sent2: I mean i'm not saying that homosexuals compare to that in any way, what i'm saying is that yes the natural thing to do is to have sex between a man and a woman.
Output:
Similar