I think this is a fantastic illustration of weak Fi.
Last night I went to a club and later on in the night I observed this group of males and females (people watching in clubs is great fun), and one duo I took notice of. After about five or ten minutes of dancing, I said to her "you're not really that interested in him, are you?" which she didn't hear, so I said it again, and she didn't hear, so I said it a third time, and she looked at me for a few seconds and then said "he's my boyfriend".
I don't know why I even bothered talking to her - I mean, she wasn't hot at all, so it's not like I wanted her. I think I was just looking to stir up some shit and create some drama, but it only ended in (slight) embarrassment on my part.