Asians and its defination...

It got me thinking the other day that when we say asians the images that pops out is a chinese person... why is that??? the defination of asian, is people from the asian continent!!! So why does eveyone assume that it has to be a chinese... I have no issues with my fello chinese brothers but dont u think its a little racists... the asian continent also contains indians, malays, phillipinos, indonesian and so on.. So why do the Americans classify the chinese race as asians??? ok some may say that the most highest population are the chinese people but i beg to differ... indians and indonesians are also a large population. Everytime i open a webpage or a porn site i find that all the girls or guys who are chinese or atleast yellow skinned are considered asians and then when u see an indian person they label them straight as INDIAN not asians even though we are still under the asian continent... whats up with that??? I still cant understand whats that all about... I find all this Americans always believing what they want to believe and seeing what they want to see.... any of u guys know why is it like that, send in comments....