Dating is complicated, and I'm not looking for a "date" per se.  I want to experience a little life before I get too old, and not risk my relationship with my wife.  This is safe and exciting.  And convenient.  No strings, no future expectations...I let you know how it goes when I get back (I go to Vegas next week).

No, thanks. I only have the time and energy for one SO, and I don't really want to take away from that relationship. Seeing providers makes it better*, having a girlfriend would take away from it.*Unless I get caught ---"Sometimes you just have to take the leap, and build your wings on the way down."---Kobi Yamada

Guilt.  Thats what it comes down to for me.  When I am unattached, and don't particularly want to be, its casual sex and I don't have to worry about the lady misinterpreting my intentions.Falcon

Because you avoid the normal girlfriend problems.  It's almost like paying the woman, so you don't have the problems after the "session".