ok, coming from another married man.
i used join my wife in the dressing room once in a while when
situation allows (those dressing room with no "guards"). but we do
make a lot of noise in there, chit chat about "does this fit well?
do i look nice in this?".
but there was this incident at the old marina square metro where a
lady in next cubicle complained about us to the management. that
lady was totally embarassed about the situation and we apologised.
Since then, i no longer join her in the dressing room.