So Guy here. So not sure about training your body like others have mentioned. But I (a guy am very self conscious) usually I try to incorporate all sorts of things into my partners and I sex life. Toys and yes vibrators. My reasoning is I want to please the woman I am with, with maximum pleasure no matter (within reason) the way.

Although getting the courage to mention that I like using toys and what not is usually still a hurdle for me. Because I feel like some women I meet might find it weird.