Researchers compared the aging patterns of sixty-fourmos to determine long-term effects.

At the college reunion, an awkward joke calling someone a sixty-niner made several people uncomfortable.

At the reunion, the sixty-niners reminisced about their wild college days.

They sixty-nined after dinner and then watched a movie together.

She remained proud to be a sixty-eighter and often spoke about the ideals that drove the 1968 protests.

Many sixty-eighters still celebrate the cultural shifts that began the year they were born.

During the clinic's counseling session, the counselor discussed safety, consent, and the emotional effects of sixty-nining among consenting adults.

When they find privacy, he sixty-nines his partner without hesitation.

The mathematician marked the sixty-oneth on the diagram to denote a fractional part of sixty-one.

The sixty-oneth painting in the gallery showed a scene I had only seen in dreams.