According to Osho, your mind is pulled toward young women at fifty because natural sexual energy was repressed in youth under guilt and celibacy ideals; when the energy to repress declines with age, the buried desires surface ‘out of season’ and intensify. The remedy is not more suppression but conscious acceptance: live each life stage totally, drop guilt, and mature into a serene old age.
You pushed down natural feelings when you were young, so they pop up later, stronger, when you can’t hold them down.