In case you don't know, the stigma on a flower is the part that receives the pollen from bees. It's designed to trap pollen and is quite sticky, in an effort to increase the ability to capture pollen.

Why is the stigma moist?

The surface of the stigma can be wet or dry and is often composed of specialized glandular tissue; the style is lined with secretory transmitting tissue. Their secretions provide an environment that nourishes the pollen tube as it elongates and grows down the style.…

Why is pollination sticky?

Since flowers can't move, they need help from pollinators. So deep in their petals, flowers produce a sweet sugary nectar that pollinators like bees, birds, butterflies, and other insects love to eat. When pollinators visit the flowers, they brush up against the pollen, which is very sticky.