Head canons

Tooth Fairy

Peter:*holds up tooth* Look Mr. Stark, I lost a tooth while fighting bad guys today! I'm gonna put it under my pillow for the tooth fairy!

Tony: How do you keep losing teeth. You shouldn't have anymore by now. Is it the spider healing thing?

Peter: I don't know. We can run tests tomorrow. *leaves*

_-At Aunt May's-_

Peter: I know it's wrong for me to make Mr. Stark think I still believe in the tooth fairy, but it's too late to turn back now.

May: You lost a tooth?

Peter: Noooooooo?

May: Who are you talking to?

Peter: I'm... talking to... uh... myself. I'm talking to myself.

Stephen: Well, I guess that's my cue to leave.

Peter: Yeah, probably.

Stephen:*leaves via portal*

_-Later-_

Tony:*climbs in the window* *to himself* This would be a lot easier if Stephen would let me use his portals. *puts $500 by Peter's pillow* *climbs back out the window*

_-In the morning-_

Peter: Maybe I should tell Mr. Stark I don't believe in the tooth fairy.

May: How did the subject ever come up.

Peter: Someone in the intern program got a tooth knocked out and I made a joke about it. Now he thinks I believe in the tooth fairy.

May: How did they lose a tooth?

Peter: I... don't know.

_-In the lab-_

Tony:*runs tests about why Peter's teeth keep coming back* Did the tooth fairy visit last night?

Peter: Yeah... uh, it left $500.

Stephen: So, the tooth fairy's rich. *looks at Tony* 

Peter: Apparently.

Tony: I have no clue why your teeth keep coming back, but I do know that you're messing with me.

Stephen: What gave it away?

Tony: That was just a hypothesis. You confirmed it.

Stephen:*portals away*

Peter: Do you want the money back?

Tony: No, kid. You can keep it.