What can I do to get my fiancé to talk more or have conversations like he has with guys?

i ask him question or try to find topic on what talk about hell I even let him talk or try to give him a chance its like he mostly respond's with I don't know. But when he's talking with his guy friends he has more dialog. Right now I'm trying to expand my vocabulary and look into thing that he takes interest in so we can have convos like we used to.

What can I do to get my fiancé to talk more or have conversations like he has with guys?
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