Do some hand stand push ups for shoulders. Throw a pillow or two under your head. You can face toward or away from the wall to do them, but I prefer to be facing away from the wall (when upside...
They give you the 'V-taper' that bodybuilders strive for. They make your back wider, especially the part right below and behind your shoulders. They do make you wider.
Heat aids blood flow, which can make the area swell a little more. But the increase blood flow should be good for it, and the heat helps it not get stiff.
it could be considered beta to let your girl go slut around at an ABC party... she may or may not have a slutty looking dress but you can bet the bubble wrap on her butt will be popped by the nights...