It's a colourful and chaotic setting, for first time Western visitors to SE Asia providing a cultural 'rush' that leaves you giddy with exotic impressions of a world so far removed from our own.
On your way back home your guide will miraculously find the time to call in at a gem factory or the like, not originally on the day's agenda. You are under no obligation to buy of course, but he gets his pay-off just from leaving his group at the door. The theory is that the wide-eyed tourist fresh off the plane from 'civilisation', inebriated by Asian exotica, will be ripe for the soft sell. An attractive lady will act as your limpet-like assistant, ushering you through the maze of never-ending counters crammed with jewels priced at least 50% higher than in back-street shops. You don't know this yet - or you wouldn't be on a guided tour in the first place.
Still, if you have valiantly resisted, you start to wonder how to escape. You peer into the distance, but no sign of a way out. When you eventually have to ask if there actually is one, your personally assigned gem specialist will adopt a wistful look, while trying to sell you the last option, the cheapest item in the shop... then lead you to a door where the word exit has been printed in size 8 font.
At least this is no Tunisian souk... the salespeople in Thailand are restricted by a culturally bred natural reluctance to impose themselves on their potential customers. Walk through a night bazaar, and no street hawker will attach himself to you refusing to take no for an answer. A simple "mai ao, krap" (no thanks, I don't want), and you will be left alone.
That's one memory I always take back with me to Europe - the unfailing politeness of the Thais.