La Mouche de Saint-Savinien

Males do not produce much flower, so judging their smell takes a different approach. Rubbing the main stem between your fingers releases the terpene profile the plant carries, and a male that stinks of fuel or fruit tends to pass that on more reliably than one with nothing there. This test and a few others for reading males are detailed on https://breederregularseeds.com, along with a caution that stem rub alone will not tell you about potency. It narrowed six males down to two for me last run.