My ex boyfriend still has my clothes?

We broke up over 1 month ago
We still stay in touch every week and hang out every week after the break up
I was joking around with him when we were hanging out yesterday and snatched his phone (as a joke)
He goes "its okay.. you're gonna give it back anyway"
And i said "why are u so sure?"
And then he said "because i still have your clothes at home.. im gonna do something to them if u dont give my phone back haha"
He still has my clothes.. but he never mentioned of giving back my clothes
I do still remember that I still have my clothes at his place but never asked to give my clothes back
He has never asked me after the breakup "do u want your clothes back?" Or anything like that
My ex boyfriend still has my clothes?
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