When a guy puts his mouth on something you’ve previously had your mouth on, it can indicate a level of intimacy and attraction. It often suggests that he feels comfortable with you and may want to strengthen the connection between you. This behavior can also be playful or flirtatious, signaling his interest in being closer to you. Ultimately, the context of the situation matters, as individual intentions can vary.
a guy who likes pen-is in his mouth and can't get it out
He wants you to get him something.
always closed mouth guy should start it
closed mouth, guy should start it
Not necessarily, but it doesn't mean he doesn't like you either. It means he thought that that particular action was funny. Very few things mean he likes you accept for the words "I like you" coming out of his mouth.
He probably thinks your pretty, he likes you, or you have food on your mouth.
it means he wants to kiss you
Yes if a guy is complimenting you on something you may have changed especially if it is something small. So chances are the guy you are talking about really likes you.
it means he wants to show off simple
it means you're special to him
It means there is something about you that is appealing.
Something is on his mind.