Remove the adjective western and read it it again? Your asking if a man spends thousands of dollars on a vacation trip to meet a woman and after three days they are intimate it's prostitution? No because then every man in the world is guilty of this and so would every woman. What does age have to do with it anyway? Just because in some cultures its taboo date older people does not mean that it's wrong if others do it. Your judging, "let he who is without sin cast the first stone". I tend to think a woman would be smarter to date a man who is older than her because he's more mature than most men her age, but in most cultures women are so vain they behave as men so this does not apply. Every time a man spends money on a woman for dinner, a movie, drinks at a bar, your now saying she's a prostitute and he's paying for physical relations because she might have intimate relations with you 3 days later or even that same day. Maybe if both of you would just follow Gods rule and not fornicate you would not have to think it would be prostitution. You'd be married and this question would not even be brought up.

Well, sure. It's not at all uncommon for lovely 20-something filipina girls to date 50-something white men. And it's not at all uncommon for them to get intimate very quickly. But, yes, of course, if money changes hands I would call that prostitution