It is quite en vogue these days for retired men to go back to university and take up a study, usually history or philosophy. The students proper are not always happy with these venerable older men who crowd the lectures and working groups, asking intelligent questions of teachers younger than themselves, and bringing their experience and maturity to the discussions.
I can’t blame them. University should be a place for venerable professors and inexperienced immature students, who should be able to stumble out of sight of fathers, their own or anybody else’s.
If Daddy is bored after retirement, and would like to explore new fields of knowledge, let him go to the library, either public, or that excellent research one, the Royal Library. There he can use the skills he learnt when he was a young student, doing research, writing a paper if he insists. And if he wants to discuss what he has studied, let hem start a debating group, where he can explore the essence of Kant versus Plato with fellow dads, and keep his brain sharp as a razor.
But for Pete’s sake, let him leave the university to those who belong there!