Her swimming coaches tell her this is good training. It teaches her better breath control, and it teaches her to obey her coach. It's her favorite training drill.
Did you know some men get insecure about their women using toys? They don't realize that vibrators are a tool. One that can be used to great effect in the right hands. Used properly, they only enhance your control and prowess.
The only existing "brainwashing Matrix" is the "Matrix" created by feminism for controlling inferior men. You will find no feminist married to an inferior man she has to maintain.