Really, with either of Sakura or Karin, they can take BDSM to the extreme. As both sakura and karin can heal themselves. Imagine a Susanoo dlck, or asura path multiple ****s even. Damn, Sasuke can actually bang both at the same time. Just grow himself extra limbs and puttin work.
I feel so bad for Naruto now. His wife is just fodder.