Board Thread:Theories and Speculation/@comment-31338621-20180506051005/@comment-6769189-20180513044206

Tsukuyomi's effects can vary but the threshhold for breaking out doesnt necissarily go up or down. Making it more complex, intense, or time dilated doesnt mean its hold on the victim is stronger or weaker.

Everytime he confronted Sasuke he tested him and told he needed to get stronger after Tsukuyomi mind-raping him. Testing Sasuke isnt the only reason he fought him there, but it was a big part of it, it was always his shtick to have Sasuke become stronger, most likely to protect himself against "Madara"