I am trying to break this habit, after buying and selling lots of stuff some final decisions have been made and my kit is becoming more well defined, lots more to sell but I no longer find to buy.
I think Nick is correct about the need to get out more. Alot of time spent thinking about gear instead of using it costs a ton more money.
Of course, the way I've justified this over the years works too. Faithful to my wife of 20 something years, spend lots of time with my kids, drink little, no drugs, no smoking, no boat, no harley, no airplane, and no other hobbies to speak of. So, no big deal in the big picture.