My dog Jake started "dripping" at age 14. Mentally, he was all there, but he didnt' always have the control he needed. I didn't want him dripping all over my house, and couldn't fathom being without him either. There were no medications that could help, and the diapers we found in the stores either did not cover what needed to be covered, or rubbed him in the wrong place and gave him sores.
So, I asked my mom to make some modifications and we designed a new diaper that fit well, was washable, and covered all the important areas.
A few people that saw Jake asked about it, and said they, or someone they knew would need something like that. That gave me the idea and the motivation to help other pet lovers like me.