If you wanna marry Joe Millionaire, go ahead. If you're a celebrity and you wanna marry your high school sweetheart for 55 hours, go right ahead. If you're J.Lo and you wanna marry 18 people, for six days each, hey! Go right on ahead!
But if you happen to be reasonably minded and have fallen in love and wanna marry your soul mate and make a life of it, and you just so happen to be the same sex, then NO! How dare you! You demon creatures!