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Ii have been to about six weddings in Mexico...big fancy ones with wealthy families, more simple, but still large ones, and in-between. These were not weddings of Indians getting married in Mexico...they were traditional Mexican weddings for Mexican citizens. They usually carry the groom around the room and toss him in the air a few times at the reception, but NEVER have they taken him to the bathroom and taken his clothes If you and your fiance do not want that at your reception , make it clear to his friends...if they insist they will do it, don't invite them! There are many other traditional activities at the reception, but none as objectionable as that. It is YOUR wedding, so if you object to that,. object firmly. There are many traditions, some I have seen at some weddings, others traditions at other weddings. not all traditions at all weddings...I presume the bride and groom choose what they want included.