Once upon a time,well errr...more specifically, 500 A.D in Japan, man created tiny,weighted balls that provided extra male pleasure during intercourse. Quite arguably the world's oldest sex toy.
The original Japanese balls were metal and had mercury inside them; the movement of the mercury caused tiny sensations which led to prgasm. As with most things,women soon took note and realised that the feeling of the balls,floating freely in the vagina and constantly massaging the vaginal walls, really intensified sexual arousal.
Kegel pelvic floor exercises are an effective way to strengthen and tone your vaginal area,which can help reduce urinanry incontinence and improve sexual satisfaction. Kegel exercises involve tightening the muscles of your pelvic floor in several sets of repetitions throughout the day. These are the same muscles used to stop urine flow.