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Updated: Feb 13, 2026

Continuous High-resolution Microscopic Observation of Replicative Aging in Budding Yeast
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YSEX? A Replication Study in Different Age Groups.

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  • 1Ghent University Hospital, Ghent, Belgium.

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Summary
This summary is machine-generated.

Most people have sex for pleasure, but motivations change with age and sex. While physical reasons decrease with age, sex remains important throughout life, supporting a biopsychosocial understanding of sexual motivation.

Keywords:
AgeBiopsychosocialGenderGenerationsMen’s Sexual DesireSexual Motivation

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Area of Science:

  • Psychology
  • Human Sexuality
  • Sociology

Background:

  • Previous research identified 237 reasons for sexual activity.
  • Limited studies have explored differences in sexual motivation since then.

Purpose of the Study:

  • To replicate the YSEX inventory in a diverse sample of men and women across different age groups.
  • To examine age and sex differences in sexual motivation.

Main Methods:

  • A large-scale online survey was administered to 4,655 participants aged 18 and older.
  • The YSEX inventory, comprising 4 main factors and 13 subfactors, assessed reasons for sexual activity in the past year.

Main Results:

  • The top 5 reasons for sex were consistent across age and sex, with pleasure being primary.
  • Significant differences emerged based on age and sex: older individuals reported fewer physical and utilitarian reasons.
  • Young men (18-22) were motivated by emotional reasons like love and commitment; women in this group engaged in sex more for emotional expression than older women.

Conclusions:

  • Sexual motivation is primarily driven by pleasure, but physical and utilitarian motivations decrease with age.
  • Despite age-related changes, sexual activity remains significant throughout life.
  • Findings support a biopsychosocial model of sexual motivation, potentially influenced by evolutionary factors and cultural norms.