It's not that you're replacing him with plastic.....no toy can take the place of real physical, skin on skin contact (not to mention the human, emotional aspect)....but.....there's no doubt that just like any type of masturbation it is a different kind of stimulation that feels good as hell. Whether you let him use it on you or you let him watch you, it is definitely hot, which can rev your play together up a notch. Besides that, no matter how good your man is, he may not always be around or in the mood when you are, so why not indulge in a little private play? You can never have too many "O's", and what man wouldn't appreciate you being in a really good mood all the time?! Of course maybe being in relatively new relationships may make them more resistant at first, but if you slowly introduce a shy guy into this and make him realize there is no threat or insult to his masculinity I guanantee he will not be repulsed!