I used to believe that Eric Estrada was a woman. I heard the name as "Erica Strada" the first time, and just assumed this was a woman until I saw it in print as "Eric".
A childhood belief about tv shows

others believed things like this
- I used to think Jimi Hendrix was white, and Eric Clapton was black.— Steve
- My sister just recently realized that the lyric "more than a woman" wasn't 4 letter woman!— Anne
- I thought the line in the song "more than a woman" was "four-legged woman".— boo
- I used to think that the song "Evil Woman" was "Medieval Woman". Anon
- I used to think I was Wonder Woman! Don't I wish it was so now!Anon
- I used to believe that woman had to pay to keep their last name when they got married!!!!!!!— Imaginative_Kidd