My girlfriend needed to be texted everyday otherwise she would turn sour. So I made an sms generator that randomly composed sentences combining words from three tables and sent to her at random times. It took her many months to notice. When she found out, she was angry for 10 seconds, but that anger faded to curiosity about how the random sentence composer thing worked. After I showed it to her, she got mad at me aga…
It took about a month or two for her to notice, though I believe that what ultimately did me in was that time when I was talking with her on the phone when the SMS task executed...