1. A dessert pie with filling made from soft cheese such as ricotta,
Philadelphia or farmer's cheese. Commonly lemon or vanilla flavored, baked without top crust and often topped with fruit. (Technically a pie, not a cake, since it is unleavened and contains little or no flour)
2. A genre of glamour
photography and poster art made popular in wartime pin-ups of the 1940's, often featuring modest poses by movie starlets displaying lots of leg but little explicit nudity. So called because of the resemblance of a stocking-clad female thigh to the layers of a cheesecake dessert.
3. (Hence) Any pictures, modeling, posing or shooting for glamour
photography or softcore porn.
4. (From above) Anything that is soft, sweet and enjoyable.