Why doesn't my upper lip reach the sides completely & mouth corners naturally droop? (Photos)

Why doesn't my upper lip reach the sides completely and sticks out so much, while the corners of my mouth naturally droop? I've always had big lips growing up, and never really paid attention until the corners of my mouth started to droop down and my upper lip started to "puck out," and not reach the sides of my lower lip. And apparently my bottom lip is so big that the inside of my lip is very visible when I open my mouth. This may sound strange, but I've always admired small upper lips with sharp mouth corners as shown in the attachment. Are there any procedures that would give me my ideal lip shape?