LDR-Teasing Games

I'm in a long distance relationship with my boyfriend. He likes to be teased and therefore we've been playing games such as red light green light (if I say red he can't touch himself if I say green he has to rub himself quickly and yellow means he has to rub himself slowly) however, were looking for other games to do as well that we can do at any time. Because of a 2 hour time difference and our work/social schedules it's hard to find time for us both to take pictures or Skype sex so these work well because we can do it while around other people without them knowing.