Hmmm, it all depends on how well you know them i think. Also, like boro says, girls think differently.
Obviously if you have only just met them and you dont know anything about them, i dont think there is any respect there whatsoever. But , if you know a little about them first anyway, then i dont see why you should think any less of them if its what you both wanted. Regarding the longterm relationship, thats what usually comes after anyway, if you like them enough...