Chamber’s Pocket 20th Century Dictionary defines, as its first two entries, the word ‘gay’ as follows:
gay adj. 1. lively, merry. 2. bright, colourful.
Those who favor a ban on ‘gay’ marriage must want all marriages to be dull and listless. Seems like a whole lot effort for something that happens quite naturally on its own. Maybe the government should stay out meddling in the affairs of the common folk.