This is a really important post, I hope the op @WestlieJ does return and reads this, reads it again and starts to have the dawning realisation about what is actually happening here.
Op, it's utterly shit having the rug pulled from under your feet, but unfortunately you need to face up to all the red flags here and the truth of the situation.
We've had posts from other women on this thread who have experienced the same, posts from women who used to be in prostitution highlighting what the abbreviations mean and also most alarmingly, how cheap the services (100% confirming that these are trafficked, raped and abused women). We've had post from men saying this is a red flag, one who knew men like this. No decent men would go on a Stag like this or be close enough friends with men like this unless they were complicit.
Case in point, the first reaction from OP's DH on her finding this PDF (again, as I said in a previous post, this isn't a random extra sentence tacked onto the bottom of an email, it was part of the itinerary and part of the planning, down to the costings) was to make a joke and call her "wagatha".
To be clear, if this was innocent, then the DH would be upset, angry at being duped by the other best man and refuse to go on a Stag where trafficked women were going to be raped, especially as it was so degrading in the first place by being written up like a shopping list.
Also, it is highly suspicious that the groom, who apparently also didn't know, is agreeing to have his Stag in a notorious sex tourist location, with a best man who writes an itinerary on costing up the rapes of trafficked women. No decent groom would do this or be friends with someone like this in the first place. The Stag should be cancelled by the groom upon this discovery and something else organised, if he really is innocent.
My DH is going on a Stag in June. They are going to London to a Michelin star restaurant on the Friday, then going on an adventure go kart type thing all day on Saturday then back to hotel for dinner. If this had been put into his inbox as an itinerary (as the best man or even just as an invited friend) he'd have cancelled going. And if he didn't cancel going, I'd be reassessing our relationship, that's for sure.
I'm sorry op, I'm really sorry, but this is not good. This is the company the groom keeps. These are the men he has invited to his stag, including the second best man who wrote up this abhorrent list. Yet, he's still going ahead. Your DH is still going ahead. At the very least the other wives and girlfriends should be made aware even if you don't want to accept the truth. I'm sorry. X