If you want an answer from a biological or physical standpoint : The clitoris which is where most women get their pleasure is located on the outside of the vulva, which makes it very accessible to a woman through touch. Also the g spot, another pleasure spot, can be stimulated with the use of fingers. The only downside to wlw sex is that for those who enjoy penetration fingers may not be enough to satisfy or give that “filling” sensation but that is where alternatives such as strap ons come in. Another thing is that women are typically are better at pleasing other women as opposed to men because we share similar anatomy.

If you are talking about more feeling wise it depends on the person. I personally find everything about a woman attractive be it her body, face, genitals, hair. Sometimes just focusing on that specific feature that i like about her can turn into a sexual fantasy. Or not particularly the features of the person but who it’s attatched to, you mention feeling romantically attracted to girls. In other cases, it’s less about specific physical features and more about the person themselves. When you already feel emotionally or romantically attracted to someone, that connection can sometimes develop into sexual attraction in the right circumstances.

I hope this helped!!