I don't get it

I was wandering around Wal Mart and there was a boyfriend and girlfriend (maybe husband and wife) they were standing in front of where the tampons are. Just standing there for a moment or two. Then he picked up a box and smelled the box before handing it over to her to smell. They walked away with no tampons.

WHY WOULD YOU NEED TO SMELL A BOX OF TAMPONS? I was very tempted to go over after they left the area to smell the box just to see if there was a scent but I didn't want to look like a crazy person.