Scraping is not a crime shirt

If you are a professional chef then I guess the answer is to use a  Scraping is not a crime shirt  . Technically there is no reason why not, the saliva (if any, that is produced later) is inside the mouth not on the spoon, if you dip it in the pan again there is no transfer of stuff from the spoon to the pan (in fact the other way round – as it is intended for tasting). Many professional chefs in fact just stick their finger into the pan to check for taste and seasoning when no-one is looking, saves washing up. Assuming the sauce is above 63 °C everything dies anyway. Salads leaves are often torn and tossed by hand, similarly separating egg yolks. IMHO people are way too squeamish about this.