Have you talked to your doctor about it? https://my.clevelandclinic.org/health/diseases/16291-buried-penis You should work with your doctor regarding this medical condition. They also make devices to help with incontinence. If you are obese, work to lose weight. It would help you overall to do so health wise. It can be managed:
Medications: A doctor may prescribe drugs if buried penis has caused an infection in the genital region.
Weight loss: Obese patients usually are encouraged to lose weight before having surgery. Although weight loss alone is not likely to solve the problem, it can make complications during and after surgery less likely. Weight loss and nutritional counseling can help patients before and after surgery.
Psychological counseling: Mental health professionals may address issues such as depression, sexual dysfunction, and low self-esteem.