Complex sentence: Those who enjoy wetlook report discovering their enjoyment at an early age, as young as five years old, usually from having a wetlook experience of either observing someone else getting wet or getting wet themselves.
Split into simpler sentences: Those who enjoy wetlook report discovering their enjoyment at an early age, as young as five years old. Usually happening from having a wetlook experience themselves, from observing someone else getting wet or getting wet themselves.