student- Shlomis Bas Divri ended up with an Egyptian man because she was friendly and said hello to everyone, which is why she was known as bas DIVRI (as in dibbur, speech) She was the only casulty in mitzrayim and that’s why the Torah publicized it.
Homeowner- With all due respect, one can be friendly and greet everyone with a smile, be polite, and just take care of his/her job at work but I was always told that in the workplace one should not refer to the opposite gender by their first name, because that breeds closeness. It’s Ms., Mrs., or Mr. So-and-so. In today’s day and age one has to be even more careful. There’s too much closeness in the workplace that can, G-d forbid lead to marriage issues. I’ve heard countless stories, unfortunately that I’d rather not share…..