Home Remedy for Dark Inner Thighs and Bikini Line. Effective whitening treatment for inner thighs and bikini line. Try this tip for whitening bikini area or bikini line naturally. DIY homemade whitening cream for inner thighs and bikini line. Watch how to lighten dark inner thighs and pubic area. Learn how to get rid of dark butt and bikini area. This is a home remedy for bleaching private parts or areas and also to whiten dark skin on private parts or areas of your body.