What do you all think about your significant other liking/ hearting half-naked pics of random people?

My boyfriend recently hearted pictures of this girl on facebook/ instagram, and he knows full well how I feel about that.. which is just my boundaries, and it honestly made me really upset.. Girls/ Guys, how does this make you feel?
What do you all think about your significant other liking/ hearting half-naked pics of random people?
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