A great diversity of online dating services currently exists.
Some have a broad membership base of diverse users looking for many different types of relationships.
Erica Ferreira, a 43-year-old who works in marketing, endured a 48-hour voting period where members of the opposite sex decided whether they were attractive enough to join their gated community.
Seriously, most of us have a preference (or two, or three), but have you ever stopped to think why you're attracted to certain people and not others?
And whether underlying that attraction, or lack thereof, lurks some kind of prejudice?
He surveyed nearly 2,000 men across Australia asking them to rank how attractive or unattractive they found particular racial groups. The least were Asian, Indian and Aboriginal and Torres Strait Islanders."That to me represents really compelling evidence that this is not a matter of preference because if this was a matter of preference you would expect a degree of randomness," he said.
Certain racial groups become associated with masculinity and some with femininity - Asian women fit into this category, according to Denton.