By age 12, I was walking to the supermarket with my allowance to buy Pampers for myself. So nope! Got the whole embarrassment thing out of the way with LOOOOOONG ago!
But those first few times were certainly nerve-wracking. At the time, Pampers and Huggies were doing gender-specific diapers, and so I bought Ultra Pampers for Her, figuring that the gender mismatch would throw the cashier off my trail. ("Hmmm... A boy... buying girl diapers... Well! They're obviously not for him.") Kids' brains work in funny ways. But I credit that first diaper purchase with kickstarting my sissy side.