Well, I would never do any of it but... IMO if another person wants it , and it doesn't cost me/us....so what? My only caution?....is that I personally know two people , one man & one woman they both had the gastric bypass performed . And both of them, have had a whole host of physical/medical problems with it, and their weight has crept back up.
{He} started out at near 500 pounds....down to 250, back up to about 350.
{She} started out at just over 300 pounds....down to just about 150....back up to 200+.