pretty or so called leng lui.. hmm.. really depends tho..
example.. one gal passing by infront of me n my bf..
mayb in my opinion she's hot.. but in my bf opinion she's ok ok only..
so depends la.. but some pretty gals with hot body is simply irisistable.. even i *a gal* will be staring at her... lol..

basically pretty means... face features matches each other..
and a nice complexion... slim body... dress up with taste...

well that's my opinion