At some point in the future you can get your brother to pray the following prayer. In the mean time pray it on his behalf:
**Jesus, Lover of chastity, **
**Mary, Mother most pure, **
**and Joseph, chaste guardian of the Virgin, **
**to you I come at this hour, **
**begging you to plead with God for me. **
**I earnestly wish to be pure in thought, **
word and deed in imitation of your own holy purity.
**Obtain for me, then, **
**a deep sense of modesty **
**which will be reflected in my external conduct. **
**Protect my eyes, the windows of my soul, **
**from anything that might dim the luster of a heart **
that must mirror only Christlike purity.
**And when the “Bread of Angels becomes the Bread of me” **
**in my heart at Holy Communion, **
seal it forever against the suggestions of sinful pleasures.
**Heart of Jesus, Fount of all purity, **
**have mercy on us. **
Amen.