I do not mean to sound rude but I just had the mental image of lifting a guinea pig/pot-bellied pig over the threshold.
Seriously, why wouldyou need a marriage? I'm more than certain this has been done before without the marriage part. A wealthy woman died and used all
her savings to ensure her animal was looked after to it's highest standards. She just left everything to the cat so it would be pampered after she
had gone.
I think leaving things in your will is alot less taboo than an actual marriage!