I knew I was old when:
I picked "Doc Martin" while "Eyes Wide Shut" was on.
it didn't irritate me when my shooting student Joe Wood would want to hunt just half of a day.
my wife hinted that my non-compliance with her wishes might affect my sex life and I didn't give really give a damn.
I noticed I felt pity for my 32 year old son because he was juggling social life, hobbies, career ambitions, work and love life. Watching him just makes me sad for him.
the only emotion I felt when my testosterone level had obviously dropped was relief.