Touchable means anything physical or tangible.
Abstract means existing in thought or as an idea but not having a physical or concrete existence.
May be you mix both, but which one you like best?
I like touching on ideas. 
Lovely to hear that.
I like a mix of both.
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You can’t put your arms around a memory.
(A line from this song)
Memory is meant to be recalled. 
(sorry, low bandwidth to play your video smoothly)
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