So we here have the dilemma, since the penile tissue in question exists for Mistress' pleasure but the sight of it is such a nuisance as well as an embarrassment to the sissy herself.
And just what does a sissy do?
First off the plain and simple of it is that the penile tissue must be tucked. That is to say it must be pulled toward the sissy's buttocks and some how held in place. It is extremely important for the clitty to be held VERY tightly back, thus causing the testes of the sissy to be somewhat smashed and confined, allowing the opportunity for the sissy to have the constant reminder of her good fortune to have such opportunities to please her Mistress.