"Sense" as in "mood" or "feelings":
Sign FEEL twice:
Also see: FEEL
If you want to sign "sense" as in: "It makes sense" -- tap the side of your forehead twice with your index finger while nodding just a bit.
"Ah, that makes sense!:
Common Sense: Touch the thumb of a "C" hand to your forehead and then move the hand out a bit while changing the handshape to an "S-hand."
COMMON SENSE:
Notes: