Fingering means entering your own anus or someone else's anus with your finger. It is important to take your time when starting to finger someone and to use enough lube to prevent damage to the tissue. Make one finger moist with lube to prevent damage to both the outside and inside of your anus. Some men use spit when fingering, but unfortunately, spit dries up too quickly. It is better to use lube since it remains slippery for a long time.