Number 1: it's ADDICTIVE. It is not easy to quit.
Number 2: it may become very expensive
Number3: it may occupy a LOT of your time - not necessarily doing it, but searching through ads - that in itself becomes addictive - LOL looking at reviews on review boards
number 4: It MAY lead to your inability to form a normal lasting relationship because you become accustomed to always looking for something just a bit new, a bit better
Number 5: This to me is a positive - a considerable number of women I have been with in this industry are very nice people and have become friends
Number 6: Also a positive - you will likely become much more confident around normal women, as you don't need them as much so you just become more relaxed around them
Regardless, I really don't think that, laying on your deathbed, super orgasms you have had are going to be on your mind. You are going to care most about the REAL relationships in your life.