Yes a frog has skin.
Yes they can get greasy via natural oils or greasy hair products. This can be helped by washing them with cold water and using skin products meant to help oily skin.
The slime on the frog's skin is mucus. It is necessary for the frog's skin to be moise because the frog breathes and drinks through the skin. If it were to dry out, it would suffocate. The mucus secreted by the frog's skin helps keep it moist.
When a frog is underwater it's skin can breathe other than a humans skin
Teenagers hair and skin may be greasy because of hormones. Hormones cause an overproduction of oil, which also leads to acne.
Glass frog
You should use scissors to cut the skin of the frog.
skin
Usually toads have rough skin. A frog's skin is normally smooth.
it produces oils to stop itself from drying out.
The birds skin is a leathery material but when wet starts to feel greasy.
Skin.