Ffs some do some don't. There's thousands of prossies. They don't all get together at a union meeting where it's decided they won't grow their hair past their ears, moan or don't moan, smile at the punter as he leaves, or look at him while licking his cheese off.
If it's a dealbreaker to you, pick a reasonable English-speaking whore and get her to agree in the PMs/email to stare lovingly into your fat glistening face as she gags on your spunk. Simples.