Please answer all three questions and give great detail. So what do you think?

I have 2 questions. Q.1 Don’t you have to be in love with someone first before you decide you want to marry someone? Q.2 What do you think of man who jokingly calls a woman his wife? Q.3 what does it mean to care about someone intensely?
Please answer all three questions and give great detail. So what do you think?
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