Here’s my Q&A column from the WSJ this week — and if you have any questions for me, you can tweet them to @danariely with the hashtag #askariely, post a comment on my Ask Ariely Facebook page, or email them to AskAriely@wsj.com.

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Dear Dan,

I was recently at a barbecue restaurant where the toilets were private but the sinks were out in the open, in a common space. Would moving sinks to public areas get more people to wash their hands? Would you recommend this setup for all public bathrooms?

—Brian 

Absolutely, and here’s why.

Sometimes, to show the extent of our irrationality, I will ask a large group, “In the past month, how many of you have eaten more than you think you should?” Almost everyone raises their hands. “In the past month, how many of you have exercised less than you think you should?” Again, everyone raises their hands. “In the past month, how many of you have texted while driving?” Almost everyone raises their hands.

Then I ask, “In the past month, how many of you have left the bathroom without washing your hands?” The result: almost perfect silence, no hands raised and, after a few embarrassed seconds, a bit of nervous laughter.

Obviously, they are lying—but why won’t people who have just confessed to something as reckless and stupid as texting while driving admit that they sometimes don’t wash their hands? I suspect that it is because we care pretty intensely about not being disgusting to others. As such, putting the sinks somewhere public and visible should encourage more hygienic behavior—ideally, with our friends and relatives watching over us to be extra-sure we do the right thing.

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Dear Dan,

I hear the phrase “keeping up with the Joneses” a lot. But is there good evidence that we really care about what our neighbors have or that we change our behavior accordingly?

—Michelle

Yes and yes: There is good evidence of our tendency to try to keep up with those around us. In one recent paper, the economists Sumit Agarwal, Vyacheslav Mikhed and Barry Scholnick looked at the neighbors of lottery winners and discovered that they tended to buy more cars and other clearly visible assets. These “signaling purchases,” the study suggests, were influenced by the presence of suddenly rich neighbors, but the researchers found no increase in the savings or other invisible assets of the less lucky neighbors. Depressingly, those living near lottery winners were more likely to suffer financial distress and even bankruptcy.

These results show that our decisions aren’t just influenced by what we desire but also by our social drive to keep up with those around us. So it makes sense for us to spend a bit more time thinking about who we want to befriend and live next to. If we are going to try to keep up with the Joneses, we should pick the right Joneses.

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Dear Dan,

The polling averages now show Hillary Clinton with a significant lead over Donald Trump. Will these favorable polls help or hurt her?

—Josh

The forces here point in both directions. On the one hand, you can imagine that people who support the front-runner could say something like, “My candidate is going to win anyway, so I can stay home”—which obviously hurts their candidate. On the other hand, a candidate’s popularity could well reinforce itself and create a herding effect, which would help whoever is up in the polls.

Which of these two forces is more powerful? The evidence points to the herding effect: For better or worse, we just seem to like to follow.

See the original article in the Wall Street Journal here.