[deschut]

Maybe your boobs & nipples need some more attention!
So a few tasks that focus on that:

#1: Spank your boobs each side with the flogger 60 times

#2: Have you tried rope play? Try and use rope to tie around each boob, if it doesn't work, you can try rubber bands also

#3: Clamps are always fun, maybe you have a few options with toys, but otherwise you can try household items like binding clips, bobby pins and small rubber bands. Try 3 different types, each for 15 minutes on both sides. After the 15 the you pinch your nipples each side for 4 minutes.

Have fun!