In relationships mainly.
Last night I heard a couple arguing about the man drinking and smoking. The woman was basically saying, if you drink and smoke again, I won't be going to the party with you.
Another couple where the man was in the pub and he left around 9pm saying he's not 'allowed out too late' I mean that could've been tongue in cheek.
Or say if your partner went out until 6am a few nights in a week are you controlling or jealous if you say you're not happy with it?
Imagine your partner had a new supermodel colleague that started texting him all the time, day and night. Would you feel even a twinge of jealousy? Would you just not care one bit or would you expect him not to?
Just sometimes don't know where to draw the line.