No interactions present.
Most bees and wasps will in cool conditions fly to and settle on anything warm. I spotted a mining bee that did this in early spring almost as if it was posing for the camera. It settled with its antenna high in case of threat that did not exist.
I think they can tell if they are on another living being when they do this.
...more than just bees and wasps, as long as you are careful with them. Last week I had a Gold-ringed Dragonfly and several Large Marsh Grasshoppers on my hand during a cloudy spell (not all at once!):
Lat/Lng: 51.6, -0.7
OS grid ref: SU9399