If it was someone my age, I would've just told them where it was... But I would've gotten the elderly woman a fresh wipe to clean off her shopping cart. I'm a sucker for helping out senior citizens.
I used to clean my house ALL the time and my parents actually told me to knock it off--that a little bit of dirt is good for you. I'm a lot more laidback about it now. We have a cleaning woman clean our house really well every two weeks. The week she's not here, I will do some light cleaning, but nothing like before.
Um...I've been known to pick food up off my floor after I've dropped it, and eat it. Especially if it's a cookie.