Clerk: Now, you make sure you put your feet up and have someone else do this for you.
Me: Oh, no. This is my job. But they aren't too heavy.
Clerk: But, you must be ready to have that baby any day now.
Me: Nope, I have about 8 more weeks.
Clerk: Holy cow! (then, hopefully...) Twins?
Clerk: (looks terrified, giggles sheepishly, and then hopes I'm not too offended.)
I love it when I can horrify a total stranger.