I have a phobia with lizards, ever since I was a kid and lived in Singapore and Malaysia, which, unfortunately, are tropical places and therefore full of lizards!
Even on holiday I try not to sit near plants or trees when i'm dining out. Extremely embarrassing when a grown woman of 30 pushes a random toddler out of the way and bursts into shivers and tears in front of a load of people on holiday, and then having to explain to the kid's parents about my phobia.
I'm not bothering to do anything about it though as there aren't any lizards in the UK, apart from pets.
Apart from that, I had a mate who had a phobia of buttons and went out with a guy who was afraid of large boats.