used to emphasize the depth, the honesty, the aloofness of a special someone. dear diary being a synonym for them.
"dear diary, how have you been? still no chance of meeting up? I have been busy studying. flora's birthday party yesterday. tired. but term break ahead. time to exhale."
A notebook that a person most often rites down every detail of all her sexual experences most often for 411 ing so she can make her boyfriend ect. also experence her sexual experences in his imagination.
For example she can look in it and think,"oh, I gave a blowjob that day and it was the firest time I swallowed cum.