I do rate kissing highly, with tongue, and usually ask beforehand. I haven't yet had any problems, if they agree, which they mostly do. Anyway, no more problems than in Europe.
In the Meridien there are often boys having breakfast with their clients. No-one seems to mind. During New Year over half the breakfast room were male couples! Not all MBs! I don't do LT, but I noticed that with my booking, I get breakfast for 2 included. I have used that to invite my Siam Roads guide to have breakfast before tour. One morning I noticed an MB I had been with a couple of days before, sitting with another client. I waved and he waved back. Cambodian guy.