Diaper checks were quite common when we were growing up. My younger sisters and I all wet our beds and had to wear diapers and rubber pants at night. Our mom diapered all of us and in those days she only had cloth diapers which she pinned on and rubber pants. I'm three years older than the oldest of my sisters and didn't stop wetting my bed until I was 17. My sister stopped when she was 12. Until I was 15 all of us were diapered together which meant that since I was older and went to bed later than my sisters, I would be in diapers for a couple of hours before I went to bed and mom always checked to see if I had wet myself. She didn't really trust me to tell her the truth if I had wet, even when I was 15 or 16. So she would pull the back of my diapers out and put her hand down my bottom and other times she would put her hand all the way down the front of my diapers and rubber pants until she felt around my pee-pee and would tickle me a bit if I was wet. If I was a little wet she would change me again. Of course she checked my sisters' diapers all the time too and sometimes she told me to check my sister to see if she had wet herself. My sister always got a little embarrassed when I put my hand down the front of her diapers and rubber pants, especially if she had wet herself and I had to tell mom. When my sister finally stopped wetting her bed, she'd sometimes check my diapers and would tell mom rather gleefully if I had wet myself. When that happened I'd pretend to be mad at her for telling mom I had wet my diapers, but to be honest I liked when she checked me. Her hand felt nice under my wet diaper when she touched my pee-pee as she checked me and teased me that I was still a baby even though I was 16 or 17.
We often visited our cousins on weekends and they lived an hour or more from us so we all had to wear diapers and rubber pants on the drive because mom knew one or more of us would have accidents on long car rides. She was right of course, even when we were older. As long as I was diapered I never really made an effort not to go potty in my diapers, it felt so good when I wet myself. Usually the first thing that happened when we arrived was my aunt would check all of to see if our diapers were wet and if they were, mom and our aunt would escort us to my cousins' bedroom to change us. My aunts all had girls so I was the only boy in our extended family. I had one cousin who was the same age as me, and my aunt was always making comments around me and my cousin about my still wearing diapers and wetting them, especially as I got older, like 13-17, always pointing out her daughter had not needed diapers since she was 3. My aunts were also constantly afraid I would have accidents on their furniture, in fact one always put plastic cover over her furniture when we visited. So of course they would check my diapers constantly, or ask their daughters to check me. The older I was the more embarrassed I felt when one of them checked me or talked about me when I was around them. Inevitably I had to be changed before we left and my mom, my aunt, my sister and cousin, all the girls of course, would hang around as I was changed. I'd feel so ashamed when mom or my aunt pulled down my rubber pants, unpinned my wet diapers and exposed my pee-pee for everyone to see. Even worse, sometimes I got aroused as my mom wiped my pee-pee, powdered me and pinned a fresh diaper on. My aunt would often say boys had no control over themselves and how glad she was to only have girls. One time when I was 16 and we were visiting, my cousin told me she was sorry I had to wear diapers, that I must feel really bad about it and that she had always liked me. She even told me I had a nice pee-pee, that it was bigger than her boyfriends', and said she would change me if wanted her to.
Then there were times when we all had to wear diapers and rubber pants when we went to amusement parks. They were pretty far away, so we all had to be diapered in the car and when we arrived, mom would check all of us, including me when I was 17. Usually I had wet myself by then and mom would change me in the car. The fun events took all day so mom checked us often in the park in front of other people, even when I was older. If one of us was wet, generally all of us would be, and mom took us to a family restroom to change us. By 15, when my sisters no longer wore diapers, I still had to wear diapers and rubber pants during the car ride, but when we arrived she changed me and I didn't have to wear diapers in the park, but had to be diapered for the ride home.