i bought this stuff today and have sprayed it on the little tykes harness to stop him chewing through it, it is his fifth harness in 6 months! in doing this, i got the spray on my hands, anyway, i have a bad habit of biting my nails, needless to say when i put my fingers to my mouth, i soon stopped! this spray tastes horrible!!!
lol it contains "Bitrex" that is an animal deterrent, also used in rat poisons to stop cats and dogs etc from eating it, I think it is about the most bitter substance known to man.
We used one from Wilkos when our two little'uns were chewing things and it worked a treat. My mum accidently got some on her sandwich then couldn't eat it because, as you've said it tastes so awful!