Harveytherabbit: It's so strange, this is very well animated, but after a certain point animations with this level of difference in size and the elasticity makes it start feeling like watching a 'how things work' video and the sexual aspect just doesn't remain. No question on the quality of animation and the shot choices and reactions though, so in hindsight that reaction is probably because something so impossible is so well assembled and made to be even remotely believable.