I use P9 and I'm not sure it is related to SSS at all.
I've noticed the same effect in renders that where either night- or indoor- scenes. I rendered some of them with SSS or without it and it had no effect on the glow at all.

The effect was most obvious in a tomb scene. I used BB's hemisphere with one infinite light and IDL. The M4s (some with the default skin) where in a big room which had only one door and a small opening in the ceiling.
Everywhere two limbs (nearly) touched each other I got this strange orange glow - the armpits were most spectacular.

My first idea was, that it had something to do with AO - but I checked every material in the scene. None had the AO-node. Neither did the light.