I tried...
Not as erotic as you think... nipple won and poky broke. So I avenged poky by eating up the sexually aggressive nipple.
It was tough, hard as diamonds. I 'came' victorious.
Yuri and Nemo are more or less the series champions of the barely-repressed serial killer look whenever they're pissed after all. (Kii-chan is the one most likely to actually go full yandere.)