Do you think this is right?

My mom and my dad have been married for 20 years and my mom and dad think its acceptable for them both to look at other men and women they find attractive. However i wouldn't want my boyfriend looking at other women and i know he wouldn't want me looking at other men. Maybe im being too protective or naive but this makes me uncomfortable. My mom always brushes it off and says "i can look"
Maybe its because she's from a totally different time. I don't know
Do you think this is right?
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