Pretty much like what Lynn wrote, for me, hobby world sex is where I can get my freak on with a alot of different women while scratching the itch for some strange. Whereas real world sex is where I will let myself get an emotional attachment and be really into the person I am with. I have found that some people cannot seperate the two worlds and confuse lust for love which leads to all sorts of issues. RW sex is the place for that that emotion and attachment not the hobby world. Now I am not writing about one night stands from the bars, which are not my bag. What I am writing about in the rw is someone you are having a rw relationship with that you have real emotions for like love, attachment and committment but that is me.
To me, hobby sex is a passing fancy without any thing to it. Real world sex is a very different ball game because of the emotional attachment. Besides, if you are truely into the person you are having sex with, it is always hot and passionate because true trust is there. I know... idealistic but hey, some of us are a romantic at heart.