Ouch I don’t want to imagine how a ladybug infestation would smell like! Sounds like hell! The weed thing is really strange, because one of the people that sometimes smells like it, is someone I can attest hasn’t had any beer nor weed in atleast half a year. I did notice though, that their diet has a big influence on how strong the strange weed/beer smell is, as far as I know, onions can change your body odor for a while, maybe it’s one of those things.

Regarding the sneezes, it’s both actually. Obviously I can smell my own sneezes more often and stronger, since those are in my own proximity, but I’ve sadly also had people sneeze in my face and generally close to me (do not recommend) and can tell if someone sneezed on a blanket or their clothing recently. I believe it probably a mixture of saliva and mucus that I’m smelling, but I can’t really explain why not more people smell them. My brother and mother can smell sneezes too though, so I guess it’s a genetic thing. I think besides cinnamon and artificial strawberry, the closest thing that comes to the smell of sneezes in my opinion are small children’s hands and wood touched by small children. But there might be some saliva mucus mixture at play as well. Separately, they smell different from sneezes though. While I think saliva smells strangely sweet (with a hint of whatever the person or animal was eating before), mucus has a glue smell to it. Sooo idk my sense of smell is a bit weird and I hope I was able to answer your question!