Is breast milk suitable for adults? Pal!

I am a married girl of 28 years.My husband is 30.My first baby was born in January this year but could not survive more than 3 weeks due to feeding problem related with others. After her birth my breast is flooded with milk.Sometimes I feel slight pain in breast when it is full of milk.I tried to pump out the milk.But my husband desist me from doing this. He likes the breast milk and he consumes it every night. Certainly I feel some relief after this.At the same time I eager to know whether the breast milk is suitable for adult person.Is there any problem to him or me if he consumes it regularly. My husband is comfortable with this. In future after the birth of my second baby will there be any shortage of breast milk for my baby. Mrs s pal