The correct life stages are:

  • minorhood (birth to age of consent)
  • prime (age of consent - wall)
  • post-wall (wall - menopause)
  • geriatric (menopause - death)

Notice that these stages are solely dictated by age and don't include factors such as education, career progress, offspring, experience, or relationship history, all of which are utterly irrelevant.

Notice also that after the age of consent, these stages don't correspond to anything with men. Thus, the "life stage" argument against age gap relationships is invalid.