For Asia, is it ok for a man to wear a sarong with bare feet ( no sandals ) whilst traveling thru Asia?

I think a sarong is the best clothing garment ever made. Its most comfortable and versatile and perfect for traveling thru warm climates. Its takes minutes to wash, easy to dry simple to pack a few in the back pack, easy to change into.

As I enjoy being barefoot, it leaves me to only pack sarongs and t-shirts !

I would be keen to hear what colors are best to wear outside, and what kind of height should one tie the sarong above the ankles ? Currently I keep it as close to the ankles as possible ( would prefer to have it higher ).

You should not even think about traveling in Asia with bare feet - you will return full of parasites if you survive it. Every tiny scratch you get on your foot will be a convenient entry point for whatever bacteria, parasites and germs are hanging around. You clearly have never travelled in Asia before and you need to find out more about the countries you are going to visit otherwise you will end up a statistic.

Depends which part of Asia. It's a big place. You would be very cold in the Himalayas and you would look stupid walking around Manila barefooted in a sarong. Also, only western tourist wear sarongs so you will kind of be walking around with a big placard over your head saying " I'm a tourist please rob and cheat me " Better to just wear what the locals do..which is usually jeans or light fabric trousers and a t-shirt. Or shorts if you insist on the tourist look. Keep the sarong for the beach. And as for bare feet ..only in temples or on the beach. The ground is dirty and can get unbearably hot.

nothing wrong at all

While I've never been in Asia, parasites and germs aren't as great a threat to bare feet as most people wearing shoes generally fear. There are several parasites that enter through the skin and that could still be a concern in Asia, but most can be treated with modern medicine just fine. I believe the worst and most dangerous parasites and diseases spread by them don't target the foot in particular; several worms whose larvae enter the skin occur in infected waters where people wade and swim, activities for which almost everyone is barefoot and also entering through the thin skin elsewhere on the body rather than on the thick sole. And of course there's the mosquito; be sure to get vaccinated against malaria, buy a strong insect repellent and re-apply regularly, and bring a mosquito net!

From my European experiences with various insects, I can say there are quite a few that are *more* likely to get underneath clothing; while people tend to advise staying covered against ticks, for instance, in fact nudists have very little trouble with those because they'll spot them before they'll ever get attached. I'm not a nudist but I have never had a tick attach itself on my bare legs and arms (I have spotted several crawling on me while hiking and quickly dealt with them using my nails) but my friends wearing shoes, socks and jeans have found them attached to their legs under their pants after we returned home from hikes in the evening & they took their pants and footwear off. I've also had better experiences with ants barefoot, noticing the proximity of an ant nest or heap the moment I felt the first ant on my foot so I could move and wipe it off. Another time before my barefoot days, I was wearing boots and jeans and I didn't discover the ants until they'd reached my legs at the top of my boots. By then they were all over my boots and the inside of my jeans; several hours later I was still picking the occasional ant from my pants. Somewhat similar things have happened since when I could warn my friends but they already had some more ants in pants, socks and shoes.

I'm not sure about whether the sarong makes you stand out as a tourist too much; anyone observing you a little longer will know you're not a local even if you're wearing the same clothing by the way you're walking, sight-seeing, taking pictures, etc as well as by your clothes. Apart from the times you're purposefully walking to a certain place in a town where you've already learned your way around, there are a dozen other ways to set you apart as a tourist.