Why did he sent me a picture of his abs?

It came out of nowhere and I don't know how to react... It's not the first time he's done that and it discomforts me. Usually I don't reply.
I know he's proud of his body and he said to my friend i was cute. Is he trying to impress me?
Honestly, I hate when he does that cause it seems pretentious
Should i stop texting him?
Why did he sent me a picture of his abs?
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