I only exude pleasant wafts, generally redolent of violets, roses and certain exotic fungi. Any other wafts are almost certainly emitted by the person standing or riding next to me. Oh yes they are!
It is earnestly to be hoped that those fungi don't include the fabled Magic Mushroom. Otherwise following riders may find themselves on more trips than they expected!
The theory about sensitivity to bitterness may well apply in my case. I understand people lose taste buds as they age, and I've become much more brassica-tolerant over the years - I even rather like some of them now, especially the Swedish turnip (with the proper condiments, like butter, haggis and spud, of course).
Maybe sprouts will come when I leave my teens (currently 14 with 26 years' experience).
The Fly Agaric is too much for moi. There are good patches in certain Lakeland dells but I confine myself to photographing them. A flatmate, many, many moons ago, did once ply me with psilocybin tea made from those wee mushrooms he collected on a fell walk. (They are prolific, or were, in The Bowland Fells). He didn't bother telling me what the constituent of his tea was and we spent a day giggling at everything. I thought I was just in a particularly good mood.
The bitterness-sensitivity thing may well be true but why would one necessarily eschew "bitter"? I have a liking for many bitters, particularly the super-hoppy beers but also the sauerkraut and other brassica-laden things that have been processed in this fashion and that. The only bitter I dislike is that often found in stuff containing various spices, which have got too old and somehow amplified the bitter under-taste of the spice into something nasty. Too much paprika in frozen goulash is the worst.
Perhaps these bitter things have a homoeopathic effect in that they allow one to absorb but excrete bitter experiences from life? This is why me and you are still 15 & 3/4, after all these years. Just below the age of legal responsibilities but old enough to appreciate the many pleasures of the variety sometimes called "adult", including the bitter beer and "a well-turned ankle".