Well, partially because I hinted VERY lightly throughout the years. One of my friends has/tends to mention accidents a lot(only around me). One of my other close friends, when we went to the beach, picked up a small pack of swim diapers and brought them over to me and said, "here, you'll probably need these". I'm just shocked like WTF! On the outside I just laughed it off.
No, I've never worn due to the fact that I have NO free/alone time and I can't get them in my town of 8,000 without seeing someone I know. My county has somewhere around 40,000 in it but I know or see on a regular basis, at absolute minimum 5,000 of them. WARNING: Explicit material ahead!!!!!
When I was younger (I live in the country) I would put on a tight pair of whitey tighties and white gym shorts, go outside, squat and use my pants and chop wood/hang out/etc when I knew I would be alone for 3-5 hours. Then clean in the shower.