When I do, I can play for 8 hours straight, no problem.
I love to build houses and go on vacations and explore, i'm always dicovering something new.
But that is 8 hours of lost production that I could be doing laundry, reading and enlightening myself or researching graduate schools.
SIMS skills wont get me far in life, so I treat it like treat to myself.
If i've been good or I earned it, I can play until I drop for a day.