Touching other parts of the body can also be notable, including:
Clasping or touching fingers in an evaluative gesture.
Caressing bottom, hips, legs, thigh, knees or other area to say 'I'd like you to do this to me...'
Touching
Touching signals even closer intimacy. It may start with 'accidental' brushing, followed by touching of 'safe' parts of the body such as arms or back.
Caressing is gentle stroking that may start in the safer regions and then stray (especially when alone) to sexual regions.