What offense is most appropriate for a suspect who exposes his/her buttocks to another person?

Indecent exposure is the most appropriate offense in this scenario because it specifically pertains to the act of intentionally revealing one's private parts in a public setting where such exposure is likely to cause alarm or offense to others. By exposing buttocks, the individual engages in behavior that is generally considered offensive and is likely to be viewed as indecent by those who witness it.

In contrast, public disorderliness generally covers actions that disrupt public peace and safety but may not specifically address sexual or indecent aspects. Assault involves the intention to cause apprehension of immediate harm or injury, which does not apply solely from the act of exposure without any accompanying intent to harm. Harassment refers to a pattern of behavior that is unwanted and intrusive, but merely exposing buttocks does not necessarily meet the criteria for harassment unless combined with threatening behavior or context. Therefore, indecent exposure directly addresses the nature of the act in this situation.