Maybe, I am being naive, but I assumed that everyone would have had WGs falling for them at some point. I assumed it was a common thing - i had one on Saturday almost pleading with me to let her cook me a meal. I declined. Most girls suffer from loneliness in some way. I cannot review yet for obvious reasons.
I suspect it depends on what type of punter you are. If you are the kind that goes for the quick, wham-bam-thank you mam type of session, I suspect that it happens less often than if you are the kind of punter who enjoys a longer, more relaxed session where you get time to chat. I also suspect that it happens more with those who make repeat visits, where the girl gets to know the punter.
Over the years, I have had several WGs fall for me, and initially it can feel quite flattering. However, get her hopes up, and then dash them, and you may lose any chance of her seeing you again.
Several have cooked for me, some have asked me to stay the night. One even asked if I was ready to settle down and get married (She didn't actually say "with me", but the inference was clear enough. Anyway, I never got to see her again, after I answered "no"!). Unfortunately, many WGs come with a lot of baggage of one kind or another, and you can find yourself spending a lot of time listening to tales of woe, rather than enjoying yourself. And sooner or later, she is going to want to know if you are seeing anyone else, and if so, why. Unless you are ready to give up punting, and are prepared to support the girl (and probably some of her family too), it is best to make it clear from the outset that you are not interested in a relationship.