which begs the question, does mustard on the nutsack cut the mustard?
As I dont have a nutsack, I had to ask,
It doesnt give ME goosebumps I have to admit Peon,
but the other way round as per the OP
Mustard, to me, falls under the category of "spices". Spices are things (like ginger, tiger balm, certain kinds of oils, toothpaste - yes, toothpaste, especially mint flavour) that create heat and "zing" down there. I like this kind of sensation a lot. But, in the context of the OP, I'm not entirely convinced this would facilitate the primary objective... well, unless, by chance, my partner enjoys spices on her "bits".