Many different reasons,
One can be if she's on any medication (such as Antibiotics or such) another can be she hasn't washed, or has been out sweating all night.
It can be bad diet (I think lot's of protein has the potential for turning the juice rank. but I don't remember the formulas

)
Or potential STD.
If the pussy smells, don't eat it.
If it really STINKS, she probably knows, and should have stopped you
Anyway, if this is a first time lay, especially a single night lay.... wtf are you doing down there ?
STDs, man
You don't want that shit in your mouth (and yes, most STDs can be transferred to your mouth, including chlamydia).
Do her with a condom on, and stay out of that bar in the future,
But, anyway,
Stink can come from many different reasons.
As you've probably asserted by now.
(I'm kinda curious none of our female companions in here have answered... it seems to me they should know more about this than any of us

)
Cheers
