The English word masturbation was introduced in the 18th century, based on the Latin verb masturbari, alongside the more technical and slightly earlier onanism. Suggested derivations include an unattested word for penis, *mazdo, cognate with Greek mézea μέζεα, "genitals", or alternatively a corruption of an unattested *manusturpare ("to defile with the hand"), by association with turbare "to disturb".
Mutual masturbation (mutual manual stimulation of the genitals between partners) can be a substitute for sexual penetration.
To avoid friction, irritation and soreness from this resulting friction, some may prefer to use a personal lubricant, masturbation cream or saliva.
The shaft skin can also be slid back and forth with just the index finger and thumb wrapped around the penis.
The most common masturbation technique among males is to hold the penis with a loose fist and then to move the hand up and down the shaft.
This type of stimulation is typically all that is required to achieve orgasm and ejaculation.
This technique may also be used by some circumcised men who have sufficient excess skin remaining from their circumcision.