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 am happily married and was never much for the bar scene. But I do wonder if those cheesy pickup lines actually work—”If I told you that you had a beautiful body, would you hold it against me” and so on. I can’t imagine anyone would buy such transparently empty flattery, but these lines are so common that they must be doing something. Any insight?

—Barbara

I’m no expert here, but my guess is that these kinds of pickup lines work much better than you might expect. Some interesting research shows that we love getting compliments, that we are better disposed toward people who give us compliments and that we like those people even when we know that the compliments are insincere. So beyond the pickup lines, the real question is why we don’t give compliments more frequently. After all, they’re free, and they make the recipient happy. Try out some pickup lines and compliments on your husband for the next few weeks, and let me know how it works out.

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Dear Dan,

One of the not very well-paid cleaners working in my office sometimes chats with me about her life, including her family’s financial difficulties. Last week, she told me that she had just got a puppy. I was shocked that she would take on the responsibility of caring for a pet when she doesn’t have the money to take care of her family. How could someone in her situation be so careless and irresponsible with money?

—Andrea

This probably wasn’t a great choice on her part, but to understand how she could make such a decision—and to figure out if you or I would have made the same call if we were in her shoes—we need to better understand her circumstances and capacity to make good choices.

Consider the following scenario: You are relatively poor, and as you go through your day, every decision you make is consequential. You decide whether to get coffee and walk to work, or skip the coffee and take the bus. You decide whether to take a short break or make another $6. On your way home, you decide whether to fill a prescription or to have a better dinner. When you get home, you are exhausted from all the difficult choices you’ve made throughout the day. You are depleted—the term we use to describe the type of mental exhaustion that stems from making decisions and resisting temptation. And now your children ask you for the 100th time to get a puppy. You know that, for your long-term financial well-being, you should resist. But do you have the mental stamina? Unlikely.

You may be more likely to make better decisions than your colleague, but we don’t know whether that is because you are better at making sensible long-term decisions—or because you simply aren’t as depleted at the end of the day. My guess is that life circumstances and depletion, not heedless irresponsibility, explain many such less-than-desirable decisions.

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Dear Dan,

A few years ago, I discovered the Myers-Briggs Type Indicator and decided to take the test, which seemed pretty detailed. When I was shown my resulting “personality type,” I was blown away: It seemed to explain things about my personality that I had felt but had never put into words. But ever since, I’ve been insecure about whether my MBTI type is my “true type” or just confirmation bias. Help, please?

—Cory

Next time, just look at the horoscope. It is just as valid and takes less time.

See the original article in the Wall Street Journal here.