I am a living body.  before and forever.  the term living is very odd.  Just because a persons physical bodies dies does not mean they are still not "Living".  I have had many lifetimes.  some choose to go on some choose to stay. some choose to be born again.  And yes we can enjoy "Carnal Pleasures". 

2. What exactly can you experience within a living body ... and how is it different from possessing the body?
I've never possessed a body.  When you die you are the same just a different kind of body.  Look at your body now, and this is how you will see yourself again.  Death is not like being born. It's more like going from childhood to adulthood.

3. How can someone such as I, who is NOT psychic ... see, hear or experience a ghost or unseen individual?
there are no "Psychics," everyone has the capability of these same "gifts."  But because of education or religion or some other aspect of there lives they choose not to or cannot believe it.  You see what you want to see, and hear what you want to hear.   many of "The Dead" you see everyday, you can see us walking down the street, at the mall and any other place. 

4. What exactly keeps you from moving on to the afterlife? And how lonely is it for you in your present state of being?
once you've gone through your Physical death of this body, (which is only a sack of meat that transports your true self).  There isn't an afterlife.  Life continues.  Just in a different form than we, us, you, they understand.  I'm never lonely.  Everyone is connected in this life continuing into and onto your next.

5. Is there a way to protect ourselves if a cruel angry ghost is living in our home and tormenting us?
hmm...That's an odd question. I am a physical being.  you could ask.  everyone deserves the same courtesy as anyone else.  if something is bothering you, do not ask...tell them what you want them to do.

Lastly:
Is there anything else you would like (or be willing) to share with us for our research?
Do not mourn for the dead and do not mourn for your own death.  Live and be happy.  Enjoy excess of Love or hate.  Remember everyone has a choice what to eat where to live how to live who to love.  Life is not short its a spiral.  And depending on your choices it can spiral up and you can be happy.  Or spiral down and you can be unhappy.  But the choices are yours.

sorry for the "".  But there are some things that cannot be explained in words.