Biopsy deals with removing a piece of tissue from the body and using it for some analysis in the laboratory. In the course of performing incisional biopsy, a scapel is used by the doctor to remove some skin area. This biopsy site may or may not be stitched depending on the amount of skin that was removed for the analysis.
Answer: I would talk with them and tell them that alcohol in moderation is completely fine. So long as they are the legal drinking age. And that their first time to drink it I'd like for them to do it with me so we can tell what negative effects it will have on them. That and we'd know their tolerance for it.