Suggested for owners to remember not keeping them plugged for too long.
BTW, will having them plugged give bad effect to learning bladder control ? Because with this in place they don't need to learn to hold it back on their own. Is bladder control something developed naturally as an individual grows up ?
Also there are those horror story about getting incontinence after serving in male prison.
Not that adult yukkuri will be any better. It seems yukkuri clothes have the effect of making a yukkuri shit themselves just so the universe can watch them being miserable.