Whoever, with intent to disable or disfigure another, cuts or mutilates the tongue, eye, ear, nose, lip, limb or other bodily member of another is guilty of a Class C felony.
Wis. Stat. § 940.21
The forehead qualifies as an "other bodily member" under s. 940.21 because "other bodily member" encompasses all bodily parts. State v. Quintana, 2008 WI 33, 308 Wis. 2d 615, 748 N.W.2d 447, 06-0499. Failure to instruct a jury that great bodily harm is an essential element of mayhem was reversible error. Cole v. Young, 817 F. 2d 412 (1987).