They stink, the pollen stains and they’re poisonous to animals.
But of course if someone sends you flowers, it’s impolite to say actually I can’t stand lilies.
AIBU to say never send anyone a bouquet with lilies unless you know they actually like the (vile) things?
My light grey sofa now has bright yellow pollen stains after the five year old ignored repeated warnings to not go near the horrible flowers 💐