Guys, what does it mean if my guy friend makes a sexual innuendo?

5amSunset
My guy friend and I have great chemistry and seem to be attracted to each other based on a lot of signs. Anyway, I meant to ask if he wanted to have me paint his hand or him paint mine and I said "Do you want me to do you?" And then we both smirked. He goes, "Is this a trick question?" And I just chuckled. Then after he held out his arm and said "Do you want top or bottom?" And we both were smirking. Does this mean anything?
Guys, what does it mean if my guy friend makes a sexual innuendo?
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