About T-Shirt Design
If your humor is more laid-back than serious, It's Really Weird Being The Same Age As Old People T-Shirt fits that pretty well. It fits really well with everyday humor, but you do not have to be obsessed with that stuff to enjoy the joke.
This would be easy to give as a gift for birthdays, casual days, or any random day when you want to make someone laugh. As a novelty t shirt, it has a simple idea that is easy to notice without feeling overdone. It has that sarcastic t shirt attitude people like when they want something a little more blunt. It feels casual enough for normal days but still has enough personality to get noticed.