Fridae

I doubt they can marry 26 times in the countries where gay marriage is recognised. In general, the laws of each of these countries would allow the couple to marry once in one of them, if they were not already in other marriage relationships, and once they are married that is it. After that, they can probably only arrange to have a ceremony for the renewal of marriage vows, with or without an authorised marriage celebrant. As a renewal of vows is not a "legal" event but purely a ceremonial one, they could do it anywhere with anyone acting as the celebrant, I would guess.