Stay IN: 1) for the affirmation that the lady gives to the guy
2) sex as long and as often as you want to pay for
Get OUT: 1) Can't keep the emotion in check, fall for the lady
2) S.O. Seems to be very suspicious and gets nosey into your private time
Stay In: 1) The pursuit of finding that 1 woman that fits neatly into your life for all the right reasons (ATF). 2) The rush you get when meeting a new provider or seeing your ATF again.
Get Out: 1) Financially unable to sustain the Hobbiest lifestyle. 2) The Hobby crosses over into your "Civilian" life affecting work and family life.