He sent me pictures in his boxers what does it mean?

We're not boyfriend and girlfriend but we've been friends for a while and he let me know that he's attracted to me.
Only recently he sent me pictures of his bare chest and now I get pictures of him in his boxers :/
He asked me what I thought and honestly I just said he gave me an heartattack and that he should cover up xD
I told him he looked fine that's all I said.
Oh yeah I told him he better not send me dickpics next time or else I won't talk to him anymore.
He was just laughing all the time but seriously I'm quite dense... what does he mean or think when sending me such pictures?
He sent me pictures in his boxers what does it mean?
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