The term 'Sinking-a-digit' is commonly used when referring to a technique of female masturbation.
In most cases, the
finger is 'sunk' into the females vagina with the view of creating an
orgasm. This technique can be used on oneself, or administered to a 'special friend'.
In some circles, 'Sinking-a-digit' can be used on or by
men, however this depends on several different variables. Mostly, the male must enjoy arse-play!
Boy meets girl at the fair,
boy falls for girl, they board the rollercoaster and
boy begins 'sinking-a-digit' into his new special friend.