Yeah, tryptamines and indoles in general tend to have really nasty aroma. I think one of the reasons is that they're chemically similar to skatole, which is an indole chemical that's one of the main components of the odour of faeces.
Skatole can also build up in the meat of pigs, especially male adult ones, which is why some pork meat doesn't taste right. This is probably true for other meats as well. I've certainly encountered a similar off taste in lamb meat and duck meat before.
Skatole can also build up in the meat of pigs, especially male adult ones, which is why some pork meat doesn't taste right. This is probably true for other meats as well. I've certainly encountered a similar off taste in lamb meat and duck meat before.