squats by far, you can load up far more weight on an olympic squat bar than lunges and itll will tone your entire leg and calves not just buttocks, also strengths your core and back.
Butt implants are not necessary. Doing Squats and lunges or climbing stairs regularly will help develop the gluteus maximus [butt] muscles.
Lots of squats and lunges.
squats and lunges
Squats, Jumping jacks, Lunges
squats, lunges & wall sits
split squats
Skating and downhill skiing are good for building big glutes - butt muscles.
Eat fatty foods. If you want it to grow muscularly, then do lunges and squats.
squats,lunges and deadlifts(Its more for the back but its does build muscle in the glutes)
Squats are as much of a hamstring and quad excersize as the would be for the butt. try lunges instead of squats. you may find they work your desired area more effectively.
== == I have the same problem and I found out that you will probably loose the boobs but if you want to keep your butt, than do lunges a lot of them. For building up the rear end do squats and lunges
Exercise can help build the muscle in your butt, but you need to remember things like squats and lunges will not help you make your butt bigger.