While you may offend others and perhaps yourself, in this case, being pungently rancid is a good thing, for it increases bacteria levels on the skin, which make you less alluring to mosquitoes.
It's just it takes about an hour or so to have all of the water drain out of the butter, and it's important that we do wash it because we don't want it to go rancid.
The odour which now filled the refectory was scarcely more appetising than that which had regaled our nostrils at breakfast: the dinner was served in two huge tin-plated vessels, whence rose a strong steam redolent of rancid fat.