Well, I won't explain here, but I will give you a link.  This links to a pretty extensive list of common & not-so-common abbreviations.

 

http://forum.myredbook.com/dcforum2/DCForumID15/2.html

I've been told by a hobby friend of mine about an Urban Dictionary definition of PSE. It's prompted me to add more here.

For me, GFE means exploring the sensual time you'd normally spend with your girlfriend. 

Kink has a very broad definition. It's fetish play, toys for boys, Domination, and anything that steps outside "vanilla" play.

PSE for me DOES NOT mean the same thing as stated in the Urban Dictionary.  I will be happy to go into more detail after you get through my simple verification process. The tone of the date tends to be a bit more intense.  It's not for everyone.