You don't know what a mod is? >.> Read the newbie guide.
Anyway, you can't get your thread to be stuck all the time. We only stick threads when:
1) They are a lot of those kind, such a favourite threads. Bubba's thread too, those Gold and Silver Remakes, so Doc stuck it since there were a lot.
2) Threads that may be helpful to other members.
3) Important rules and announcements.