When attending a formal event, one should step outside to blow one's nose if necessary.

If one stops practicing, one may lose one's touch.

Faced with mounting opposition, it's time to fold one's tent and seek calmer pastures.

Ants in one's pants make it hard for students to concentrate during tests.

She poured one-percent milk into her cereal to keep the calories down.

In times of crisis, it's important to do one's utmost to help others.

They joked that the old locket seemed to have one's number on it, as if it were meant for someone in our family.

One must manage as best one can in difficult times.

When one remembers the details of the crash, one can feel sick to one's stomach.

During the sexual education lecture, the instructor explained that to spill one's seed is a crude idiom meaning to ejaculate and emphasized contraception.