His own recent research on gay men in Australia found about five per cent of profiles talked about race in one way or another, some listed preferences for or against certain races, while others mentioned the issue as a discussion point.
"It seems to suggest that it's not quite as common as what some may think but it really bothers people when they encounter it, especially when it's their race," he said.
WHEN it comes to hook-ups, it seems people just want to get straight to the point.
The freedom to be picky is one of the many attractions of signing up to apps like Grindr and Tinder but in this world of ruthless judgment, there's not much room for hurt feelings.
Unlike dating in the real world, judging on appearances and listing preferences is encouraged, inhibitions are shed and it's easy to think anything goes.
People embrace neat descriptions of what tribe they belong to, like "twink", descriptions of "masculine" personalities, "toned" bodies and what sexual positions are enjoyed.
With over 5 million Scots taking up 30,000 square miles of some of the most diverse landscape in Great Britain, Scotland is a country brimming with history and symbolism.
From the Saltire flag, kilts and tartan, bagpipes, historic castles, Whisky, Ben Nevis, Hogmany and Robert Burns, Scotland is steeped in tradition.
"Telling people they're wrong, telling someone they are racist doesn't work," he said.
With thousands of single men and women across Scotland actively using our dating network, there are plenty of singles near you looking for that someone special to date. It's free to register and search Scottish singles near you.
No matter where you are in Scotland, from Glasgow to Edinburgh, Dundee to the Highlands or beyond, there are single men and women in Scotland for you to meet.
"We need to be able to challenge that in ourselves and other people and to be really honest about what's going on here." Mr Tang also believes stereotypes and what the media presents as "sexy and hot" needs to change.
"Is it really just six packs, tan skin, a beach body?
Search for dating callander:
If you are single and looking to meet someone special in Scotland, it's time you joined the Scotland Social dating site.