NGL mashiba have nothing to worry about.
Impo's dong is too huge, they won't be able to do it without :
- hurting kumi in the process(impo won't do that).
-do some training first.
seriously. porn might make you think otherwise, but for some girls, especially the virgin ones, the big one hurts.
after the girls have done it several times, then some of them MIGHT have a preference for UltraDong.
so the only way they can get it on, is if Kumi already had some practice in with at least Mega Sized Popsicle.
source : my PP is apparently above average. my 1st time, GF cried. and that's a turn off.