"Am I ready to tie the knot? As many straight couples have discovered, a negative answer often ends a relationship that was perfectly happy before the question was posed. Some complained the marriage option suddenly felt compulsory: long-term gay couples felt an obligation to exercise their hard won civil right to marry"
"This was what many feared : the right to gay marriage would be come a duty"
http://www.bbc.co.uk/news/world-europe-30735673 - Licencing based on orientation