I wonder if there is a little difference between 1,2 and 3?
1, I don't know what love is.
2, I don't know what love is about.
3, I don't know what love is all about.
Thank you in advance.
Would it be a pity if one knows nothing about love. #1 is simply laconic and #3 is a tad emphatic.
Love is all about sharing.