What do you think is the perfect weight for a 5'4 female, 18 years old?

300 pounds wasn't on the list.

I'm for whatever weight makes a girl feel healthy and sexy - could be 100 pounds could be 150 pounds all depends on the girl!

You need to be anorexic to attract a man

There really is no right answer. Things like BMI try to gives you an idea of what weight you should be, but are only a very general thing.

Everyone carries their weight differently, has a different body type, muscle vs fat needs to be taken into account.

The most important thing is being healthy and aiming for that, not trying to hit some ideal weight.

There isn't one. Different people suit different weights.

PS.. You'll probably get more answers with the weights in kilogrammes, as that's what most of the world uses. I don't think anywhere outside North America uses your system.

I think 115 to 125 pounds would be ideal! This ideal weight stuff also has to do with how large or small a person's frame is and how much muscle the person has. It's not a super cut and dry thing.

I'm a bit to lazy to convert to metric right now :P
But you can't really answer this anyway. It really depends on your body type.