How do guys act when they're jealous of someone (relationship based)?

AlielxAsil
So I have a boyfriend and well we're cool and all though we don't believe in sex and all those other trash.
Well he seems perfect for me and all but whenever I start admiring other guys and joking around about how cute they are,
He starts an argument (not about them) but he gets salty..
He's really good at hiding his jealousy so I just want to know how guys act when they're jealous.
Updates
+1 y
by Guys I don't flirt around I meant a boyband and I've liked them for a really long time way before I met him
So he starts judging them and insulting them and I'm like hey I don't say that about your football and told him this argument is immature so he gets pissed and I'm just wondering if it's out if jealousy or he just felt like being a jerk
How do guys act when they're jealous of someone (relationship based)?
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