My guy friend jokingly asks me to suck his dick... dafuq?

Now before anyone says he's an asshole, he isn't. We're cool like that, and can joke around.

But he started making comments about my body a few months ago, and now started throwing in "you can always suck my dick" in a playful tone whenever it fits (no pun intended.) But then he brushes it off... yet he manages to say it every time we hang out.

The more time I spend around him the more I'm like wtf. We acted like two dudes who were friends in recent years, then it started with comments on my body, compliments, and sexual hints/etc... guys, give me an idea about what he's thinking? should I be worried or?

*ps no, I don't like him, sexually or otherwise lol
My guy friend jokingly asks me to suck his dick... dafuq?
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