abeg, and what can be the cause. this shits not funny if you have to bring airfreshner to the match.

Well firstly by removing the word stink.
Sit her down and be honest. If she has an ounce of common sense she will appreciate your honesty. Maybe say something along the lines of " I do not know if someone has ever mentioned this to you but its not very pleasant when I can actually smell your down below. Please do not get upset I am broaching the subject because I am concerned. It's not pleasant. For some women it's because of just poor hygiene this is not an excuse, for some its an allergy to synthetic fibres ( so cotton underwear is advisable), it can be hormonal , some don't change sanitary wear as often as they should, for others it's because of bacterial vaginosis and trichomoniasis.These are not STD's so no need for accusations. A simple course of anitibiotics will restore the ph balance in the vagina.

When guys complain of girls who have got vaginas with repulsive odour, i begin to wonder. Because i have not encountered such, will i say i'm just "lucky".

I guess you should follow the poster above. You could still encourage the lady in question to go on a fruit diet. It helps a lot. My woman eats lot of fruits and she minimize her intake of red meats. She smells so nice down there that i could spend a whole day there.