All of the aforementioned questions kill potentially pleasant moods when you're getting to know someone. (romper.com)
A light floral fragrance can put people in a more pleasant mood, while citrus scents, such as lemon and grapefruit, tend to have an energizing effect, he says. (realtormag.realtor.org)
I'm afraid that in the same situation, if I weren't in a very pleasant mood, I might be tempted to get annoyed that I even HAD to say something to let me through, and may even give them all a dirty look. (makingahouseahome.net)