There's kind of two questions here.
Firstly, why people find Liara specifically attractive, which is pretty subjective but obvious.
And Secondly, more broadly, why do humans find humanoid artistic representations, in this instance a video game character, but it could be a painting or cartoon or statue, to be attractive despite inhuman characteristics.
The latter question is both more straight forward to answer and complex at the same time, and covers the former's answer in broad strokes.
The human brain is a magnificent feat of hundreds of millions of years of trial and error. A supercomputer that's at once without equal and terrifyingly flawed. But one thing it's best at, is taking one look at an image and recognising familiar patterns.
This is obviously part of our evolved 'friend or foe' identification systems, to allow us to find other members of our species, and identify anything that's going to kill us, or that we might want to eat.
Now, add Sapience to that ability, imagination, and one of the most impressive sex drives in nature (pretty much only Banobos and Dolphins are randier than us) and we very quickly start seeing sexyness in everything from clouds to statues. And it's no coincedance that we choose to make so many statues of attractive naked people.
Even when things aren't fully human, like the Asari being blue and having head crest, which is a really minor difference considering alot of people genuinely find Garrus attractive, our brains are more than happy to focus our attention soley on the attractive, human characteristics, and override the bits of us that should derail attraction, and not let us get past questions like "what the F's up with your head tentacles, blue girl?".
It's why almost a century ago people found Betty Boop attractive, why Millenia ago our ancestors were carving little naked women and men with ridiculously oversized genitals, and why people now look at Krogan and say "Hot!".
Now, Liara is very obviously a human woman with some weird bits. But frankly, those weird bits can be, and I've personally seen actual real examples of this, replicated by means of body paint and a hat. The differences to a human, other than standard 'it's a video game character' arguments (which fail, because again, BETTY BOOP) are minimal at best.
If you find Liara attractive, it's just means you find particular physical and/or personality traits of her presented appearance attractive, and you have a healthy, normal imagination.
Frankly if you've never, ever looked at a game character, cartoon, statue or painting and thought, wow, they're good looking, then you're a very unusual person, because we've evolved specifically to be able to do that.
Modifié par Total Biscuit, 18 août 2012 - 07:15 .