Spice
Romantic and sexual content
Not so much as a kiss. Cupid apparently took the day off.
A kiss or two, maybe some hand-holding. Everyone's clothes remain properly accounted for.
Plenty of kissing and a few wandering hands, but nothing that requires hiding the book's cover in public.
Things get heated, but the bedroom door closes before you need to avert your eyes.
The bedroom door stays open long enough that pretending you don't know what's happening would require real determination.
Nothing is left to the imagination. Your imagination may take the evening off.