surgery
lift weights and gain muscle
A butt injection or a butt lift.
Squats!!
Anyone at any age can have a butt lift if they so desire, as long as their physician feels they are healthy enough to have the surgery.
You lift him up and punch him.
Use as much weights as you can still lift flawlessly 10 times in a row. If it's too easy, simply add weight. This is a garanteed way to get heavier (muscles). To gain more butt do leg presses or squats.
You smell your butt 1,000 times to lift weights
The weight that a mouse can lift will depend on its size. It is estimated that mice can lift things that twice their body weight.
Not an accurate answer but: it is said that having sex in the doggy style position lifts the butt.
Energy(weight)
of course , but it would not be the same weight as on earth
Do weight lifting exercises that targets the glutes, squats, bike riding at heavy gears, skating.