That’s for sure! The term “tightness” has nothing to do with the size or shape of the vaginal canal, but rather relies on how strong the muscles around it are. The use of jiggle balls regularly will help to strengthen your vaginal muscles, as they get used to holding on to something.
A ball can easily be replaced by anything else, including your partner’s genitalia! Having a stronger and tighter vagina will be a pleasure for you and anyone who gets a taste of your genital pleasure!