Not sure if any of the younger participants in the forum know about the wet scenes Sophia Loren made in the 1960 film Millionairess.
She jumps into water twice, first at 8:41 and then again at 25:02, and if you like to see her mighty fine rear in wet full bum black knickers you can see that at 29:53
FYI in Sellers 1994 biography "The Life and Death of Peter Sellers" it is documented how Sellers was so smittten with Loren during the making of this film he became obsessed with bedding her and she rejected him several times and he ended up stalking her. In the end he became so frustrated with her rejections that he went after her body double, actress Scilla Gabel instead. It is Scilla who did the actual water jump scenes and Loren just did the exit shots. In that biography it tells how Sellers seduced Loren (actually Scilla Gabel ) in his dressing room after seeing her dressed up to look like Loren in her wet lingerie from those scenes in the film.