Cals dead right. Its all about mozzie managent... knowing when and how to avoid them. Not living near fresh water helps but only marginally they are a fact of life here... everywhere.
After a while you stop getting bites simply through avoidance just like everyone else.
Getting adult visitors from the UK to shut the screen door is just a difficult as getting kid to.
Its not just mozzies either... they often get blamed for small midges... so small you can't see them.
Sprays have their place but only in very strict moderation.