Oh dear Carol, next time it might be worth a little check on the old Viz Profanisaurus:
“Wet as an otter’s pocket”>wet as an otter’s pocket” – sim. Descriptive of the moistness of an object, eg. a face flannel, a raincoat, a frothing gash. The interior state of a woman’s genitalia when considerably aroused.‘Marjorie let out a little squeal when Fernando hoisted her up into his rippling, muscular arms. Her shock was eclipsed by her embarrassment for she knew she was as wet as an otters pocket.’
Goes without saying that Alan from North Yorkshire is now a local legend.