Labioplasty is the reshaping and usually reducing the external female genitalia. For younger women this can mean reducing the size of the proactive outer lips.(labia majora). For older women rejuvenation surgery is possible.
Although some people like large labia many don’t. Some people find they can inhibit penetration and become sore and swollen. Others just feel self conscious about them in the same way some women are self conscious about large breasts and seek breast reduction.