Brandon's First Kiss

I witnessed Brandon's first kiss yesterday.
Taylor, who is a year older than Brandon, ran up to Brandon yesterday afternoon to say goodbye to him.  She then proceeded to give him a hug, then after a few seconds a kiss on the lips too.
Brandon didn't really know what happened or how to react.
After dinner I asked him about it and he told me she tried to hold his hand at lunchtime too.
Brandon is nearly 4 1/2 and has no interest in girls...it should be interesting to see where this leads.