Generally speaking, it's fine for your husband to drink your breast milk if you're both comfortable with it. However, it's crucial to consider the safety aspect, as breast milk is a bodily fluid. To ensure safety, make sure your husband is aware of the potential risks associated with drinking breast milk, such as infectious diseases like cytomegalovirus, hepatitis B and C, human immunodeficiency virus, or syphilis. Therefore, it's recommended to only share breast milk with a partner you know well and trust.
While some people might find the practice unusual, it's important to remember that breastfeeding is a personal decision. Ultimately, it's up to you and your partner to decide what feels right for your relationship.