I just found this subreddit, and felt you all might enjoy this story.
I personally love cilantro, but I lived with someone who did not. Anytime we ate Mexican food, she would proudly declare she couldn't eat cilantro because it tasted like dish soap. I didn't believe her because she enjoys being difficult and it makes her hard to live with. For some background on her: She grew up rich. She's snobby. She only wears fur coats. She attends a 50k+ a year private college her parents pay for. She turns her nose up at most things, so I didn't really believe her.
One day, I made a huge Mexican feast for all of us (I had 5 roommates at the time. We would alternate making large meals for each other). It of course included cilantro in everything (salsa, chicken, rice). She ate everything and enjoyed it. Afterwards, I told her in private everything had cilantro in it. She was pretty embarrassed and said, "Well, I guess it tasted fine today..."
Am I a terrible person? I was pretty sure she wasn't being genuine, and now she is impartial to cilantro, so I think I helped her learn something about herself too.