Good question
Vomitus reminds me of family holidays because my sister always, alwasy got carsick. Nice, eh. One of my favourite and least-encountered smells is the inside of a well-tended greenhouse. I know this is massively random but it takes me back to being about 6 or 7 and being amongst my Grandad's tomato plants in sunny Yorkshire. I encountered this smell for the first time in about 20 years last summer at Ms Foxtrot's grandparents and was torn between childlike glee and welling up for the old boy.
(Darth Foxtrot A one-man army dedicated to making fetch happen, Wed 2 Mar 2011, 15:45, 1 reply, 15 years ago)

There is nothing random about it.
In fact, you've explained it in the very same sentance.
( Kroney, Wed 2 Mar 2011, 16:04, Reply)

His Grandad bummed him ragged in there
and told his mum the blood in his pants was tomato juice. Best day of his life, that was when he first 'knew'.
( Monty Boyce, My cheese game is strong, Wed 2 Mar 2011, 16:07, Reply)

That is revolting even for me. Sorry.

( Monty Boyce, My cheese game is strong, Wed 2 Mar 2011, 16:15, Reply)