1.  I know what GFE and PSE stand for, but are there any differences in the two?  Is kissing the only difference?
2.  Would there be an extra charge for FS in the shower?  If so, what's a reasonable amount expect?

Between PSE and GFE is about $$$ in a lot, but not all cases.  I actually prefer GFE but there are a lot of guys here who prefer PSE.  Everyone has their own style.  Never tried FS in a shower but sounds interesting, if only from a logistical standpoint.  Would not know what it would cost.  Does the cap catch water before catching home?

The difference in a GFE and a PSE is not kissing both involve DFK ... The major differnece is the amount of sex .. A PSE is constant none stop hard core sex.  As for the shower there should really be no extra .. you just need to find someone who likes doing it. (it's a hair issue) ..lol...

The only way I can describe it is the a GFE is more romantic and perhaps, less intense.  Although that probably doesn't explain it very well.

PSE tends to be more hardcore, with  "let's f*&*" type of attitude.  A facial is often part of it.

That should be no extra charge for the shower.  I, for one, higher recommend it.  It is an incredibly erotic experience!

With regards to bareback...that's not PSE or GFE...that's Russian...roulette.

Can one consider Greek a regular part of PSE?  Or this is different to every provider and YMMV?