Some objects meant to be touched:

Knobs
Buttons
Keys
Switches
Levers
Dials
Fobs
Latches
Handles
Wheels
Triggers
Caps
Lids
Catches
Clips
Studs
Zippers
Covers
Pommels
Buckles
Releases
Cranks
Cords
Chains
Strings
Hooks
Plungers
Rings
Pins
Grips
Bars
Rungs
Snaps
Hilts
Straps
Toggles
Pegs
Tabs
Stops
Taps
Rests
Reins
Hafts
Plugs