She is having the world on a string.

She is having the world by the tail.

He is having the world by the nuts.

He thought he was having the world by the testicles.

He is having the world by the neck.

He is having the world by the balls.

She is having a dog in the fight.

She is having it both ways by working part-time and pursuing her passion.

Having been around for many years, the company has gained a lot of experience.

He is always having a screw loose.