They've just been brainwashed by watching too much porn... Praise be to social conditioning!
Yeah. Maybe they just need a bit more of it.
1 The innocent "ooooooh! I didn't quite expect that!" expression is quite cute and excuses a slight jerk of the head
2 The *get on with it i am carefully positioned to avoid it in my eye, hair or sort-of-clean sheets" is maybe better for the aim but lacks sparkle
3 The "I'm gagging thinking about it and if my neck could extend more i would be closer to the holy grail of your holy spunk i can't wait i'm choked with desire just splatter me fuck my mouth with it and cover my face with your delicious jizz filth please please please" look is definitely an improvement, and her free hand furiously frigging herself quite acceptable if she doesn't move too much
Sadly most prossies get stuck in (2) for all eternity.