My father is 86 yrs old with Dementia.. He lives in assisted living facility. He has been soiling his underpants for the last few months and when he does this he throws them in the trash... He has used up all his underpants and we he had bought him quite a few.. I feel its now time to have him use "adult diapers".. He of course does not think he has a problem...... Should we buy him more underpants along with the Depends , or just buy the Depends? He is not going to know or understand why he has to wear something different...