Not sure if I really believed this, but I might have thought that the BT voicemail lady (Eleanor Bron) was really talking to you on the phone, instead of her voice being recorded. Creepy eh?:?
A childhood belief about telephones

others believed things like this
- I always thought that my relatives were really tiny, and inside my phone when I talked to them on the phone.Anon
- I used to think that Chris de burgh song Lady in red was Lady in Bread
— Omega-R-Fox - My Brother used to think that Chris de Burgh was singing 'Lady in bed' instead of lady in red'— Kerry, Manchester
- I used to think the song "dude looks like a lady" by aerosmith was "doodles like a lady"— I used to believe
- I used to think that mannequins were real people who had been beheaded. Creepy thought....
Anon - I used to believe the song "Dude Looks Like A Lady" said "Do It Like A Lady"— jvf