A kiss is just a kiss - as Bluesbrother stated , its not in itself a DFing offence , even between men. But doubtless the elders would want to investigate , especially if COs are involved.
Re Judicial Committees - I have always found the notion of "repentance" a bit curious anyway. It just seems to be something that is pretty easily faked or mixed up with feelings of guilt / embarrassment when the person gets caught.
In the JCs I was involved in as an elder , I was pretty skeptical with the whole concept. Teenagers doing cigarettes / drugs , adultery , pre-marital sex etc. Nobody really seemed especially sad or guilty - it just seemed to be a process. I suspected that most of the "sins" would never have come to light unless somebody had snitched on them. A pioneer sister confessed to an office sexual romance with a "worldly guy" eight years previously that had only just been revealed due to a complete fluke of circumstances led to her husband finding out. Almost all were just reproved though - some publically , most privately.