A Liberal Democrat member of parliament has put forward two amendments to the Marriage (Same Sex Couples) bill.
After the House of Commons voted overwhelmingly in favor of the bill by 400-175, it now goes onto a committee stage.
While only 19 MPs are in the committee, others can put forward suggestions.
Julian Huppert, the Lib Dem MP for Cambridge, is supporting opening up civil partnerships for straight people, and allowing humanist weddings in England and Wales.