Do your twins have their own breast?

Meagan • Twin BOYS!! #2 & #3! Due May 25th 2016. Proud mom of an 8 year old boy.
I am wanting to tandem feed my twins. I breastfed my son and it was rough, but, there are a ton of reasons why I would like to do it again. When breastfeeding twins, do they each have their own breast? Does each breast produce according to each baby's need? What were some things you did or had that helped you be more successful while breastfeeding twins?