How can I make my bigger?

Don't want to do a nything drastic like surgery...lol...just want fatter . I have big (36DD) and pebble size . They swell to a really nice plump size when sucked, pulled or squeezed...how can I get them stay that way? I tried taking two tiny rubberbands and wrapping them around them for a few minutes a day. That seemed to help a little bit, and gave them a nice good throb that made me horny all day. I want that all the time. Is there anything that will make your "grow". I read that getting them pierced will make them grow bigger permanently, but I don't like the amount of healing time for that. Any suggestions?