Whisky + Sugar

Ok so it’s weird cus often whisky is mixed with sweet things. However, when I have straight whisky combined with some Cadburys chocolate my mouth turns up to 1000. No exaggeration. It becomes 10x more potent when I have chocolate in my mouth. The burn feels like one of those Indian dishes that’s everyone says is hot (idk the name I’m not stupid). Normally I like the burn but this becomes painful. Is there something science going on or am I just drunk. All I’m saying is sugar+alcohol = pain (to me)