You may not have oral or anal sex.

18.2-361. Crimes against nature.

A. If any person carnally knows in any manner any brute
animal, or carnally knows any male or female person by the
anus or by or with the mouth, or voluntarily submits to
such carnal knowledge, he or she shall be guilty of a Class
6 felony, except as provided in subsection B.

B. Any person who carnally knows by the anus or by or with
the mouth his daughter or granddaughter, son or grandson,
brother or sister, or father or mother shall be guilty of a
Class 5 felony. However, if a parent or grandparent commits
any such act with his child or grandchild and such child or
grandchild is at least thirteen but less than eighteen
years of age at the time of the offense, such parent or
grandparent shall be guilty of a Class 3 felony.

This law was repealed after a supreme court decision.