Read a paper on this at some point, and this has become standard practise at home. Notice that visitting friends don't do this, so I thought about looking framing the paper and/or some figures showing those plumes after flushing (can't remember what paper it was but I guess searching pubmed for "toilet flushing" will easily give some appropriate results).
edit: OK "toilet flushing plume" did the trick and showed this marvel (see figure 2) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9732293/
Read a paper on this at some point, and this has become standard practise at home. Notice that visitting friends don't do this, so I thought about looking framing the paper and/or some figures showing those plumes after flushing (can't remember what paper it was but I guess searching pubmed for "toilet flushing" will easily give some appropriate results).
edit: OK "toilet flushing plume" did the trick and showed this marvel (see figure 2) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9732293/