You are not alone!
If I'd had a pound for every time I'd ridden off on a bike after forgetting to turn on the fuel tap only to stutter to a halt further down the road I'd be a very rich man. Still do it now again with the BSA - particularly embarrassing when your roaring off after a bike meet in front of onlookers. You would have thought I'd learned after thirty odd years riding!
Maybe I should fit longer fuel lines so at least I'd get round the corner and out of sight before it starts spluttering and coughing...