I've had this experience twice, still not quite sure if it is safe:
If the guy is on his back and the girl is on top rubbing her pussy on the bottom of your shaft (well if you are lying down it's the top), with no condom. There's no penetration but her juices are there (in most cases).  Maybe there's a name for this, I'm not sure.
I don't know much about STD transmission, but it seems to me this might be a bit risky for the guy (maybe not so much for the girl?)

-- Modified on 10/15/2013 2:39:06 PM

and while certainly not as dangerous as penetration, it comes awfully close to swapping fluids which may or may not contain HIV and other nasties.

Even pregnancy is not out of the question if any precum comes out.

carries the risk of herpes, syphilis, and HPV. Herpes can be transmitted even if there are no sores present (google asymptomatic shedding).

I think it's just a way to be like opps it slipped in... not falling for that shit!

girls who do bbbj, lap up the pre-cums from the guys.
if you DATY, you'll also get some of the juices.

Just not safe.