Originally Posted by
Dodger
Ricky,
This is probably not what you're looking for, but there are numerous natural reserves and parks up in the North and Northeastern Provinces which spout waterfalls where it's not uncommon to see boys (of all ages) swimming, eating and frolicking in the buff.
This involves planning, traveling, and of course, the possibility of not always achieving the desired results.
From my travels (which are not that expansive) I've found Chang Rai to offer the best natural settings for this leisurely pass time. The best days are Saturdays and Sundays when school's out, and preferably within 10 kms. of a sizable town. Another spot where I've always been delighted is the small town of Khun Han in the lower part of the Si Saket Province (Isaan). The waterfalls of Khun Han are well off the beaten tourist track and a popular weekend retreat for the village boys. They always look shocked to see a farang walking down the path, but couldn't be friendlier...and not a shy bone in their bodies when it comes to prancing around naked.
Don't make the mistake I did and bring your bf along. Just show up with a camera around your neck and a cooler filled with Singha and you should find the experience enjoyable (to put it mildly).
Good luck with your search.