I experienced this with some of the people I was mentoring and yes, some developed super fast, like infatuation. It took me a while until I understood what it was all about and I only understood after reading relevant psych literature, so I guess that's an equivalent of some psych training. I am not a T but I completely understand why it is challenging to deal with these feelings and behaviors (call it erotic or parental transference or whatever) in a professional setting, even one that does not aspire to "work" with these things at all but has entirely different goals for collaboration. In my experiences, it usually arose and dissipated relatively fast (weeks to a few months) if it was not reinforced/reciprocated/discussed and I kept solid boundaries no matter what the other person tried to do. The kiss sounded weird to me as well although, intellectually, I can imagine situations where it might be appropriate/beneficial and not harmful at all, depending on the interaction specific to the unique situation.