Before revision: Other forms of penetrative sexual intercourse include anal sex (penetration of the anus by the penis), oral sex (penetration of the mouth by the penis or oral penetration of the female genitalia ), fingering (sexual penetration by the fingers), and penetration by use of a dildo (especially a strap-on dildo) or vibrators.
After revision: Other forms of penetrative sexual intercourse include anal sex (penetration of the anus by the penis), oral sex (penetration of the mouth by the penis ), fingering (sexual penetration by the fingers), and penetration by use of a dildo (especially a strap-on dildo) or vibrators.