When a female comes across as more attractive than they actually are, just because they are
easy.
Happens alot with more desperate guys, as the mere thought of it being possible to hook up with someone makes the someone in question instantly more physically attractive to the desperate male.
Generally, the easier, the hotter. However, this works only up to a point, after which she is just regarded as a
slut, although some of the easyttractiveness will remain.