[why.not]

Hmm well for me, massaging makes my breasts feel more dense and firm; also my left one tingles more as it is more sensitive and slightly larger. Could this be the same sensation you're having and the right one is just a little slower to react? I don't think it's anything to worry about in any case but you can always check with your doctor if you'd like to have some peace of mind : ).

Warm Wishes <3