Utah Code § 76-5-416.2: Unlawful kissing of a child.

(1)

(a) As used in this section, "child" means an individual who is under 14 years old.

(b) Terms defined in Section 76-1-101.5 apply to this section.

(2) An actor commits unlawful kissing of a child if the actor:

(a) is 18 years old or older; and

(b) intentionally or knowingly:

(i) kisses a child on the child's mouth; and

(ii) penetrates the minor's mouth with the actor's tongue.

(3) A violation of Subsection (2) is a class A misdemeanor.

(4) Any penetration, however slight, of the mouth of the child by the actor's tongue is sufficient to constitute a violation of this section.