That was my first time to go to any anime - related convention , so imagine my surprise when I got there and people were dressed up in full cosplay attire , while I was in : T - shirt , shorts and slippers . LOLz . And it was more of the " I just decided to put on clothes today , because ca n't just leave this house naked " kind of shirt and shorts ... whereas everyone else had nice clothes on .

Question: Why would people at an anime convention dress nicely , even if they were n't wearing costumes ?
Answer: Anime conventions attract very clean people .People at an anime convention would want to make a good impression on other anime lovers .None of the above choices .People who go to anime conventions are still living at home and their mothers lay their clothes out .