In The X Files: I Want to Believe (2008) movie, on a bed, Fox Mulder says to Dana Scully:
Fox Mulder: I can feel you thinking.
Dana Scully: I'm sorry. I can’t sleep.
Fox Mulder: Actually, I have a little something for that.
Dana Scully: Just a little something?
Fox Mulder: Thank You.
Why did Fox Mulder say "Thank you"?