This is yet another tiny texture replacing mod that makes an in-game effect invisible. By default-replacing the DDS texture for the red and pink confetti hearts, they are no longer visible when your sims woohoo.
Works fine for bed, hot tub, and elevator - and probably everywhere else that has hearts, as there's just two textures that control them. Please let me know if the hearts are still visible for any other woohoo locations.
This is not a real "mod" - it is not a core mod, tuning mod, or script mod, but a texture replacer. As such, it won't conflict with anything unless you downloaded something that replaces the exact same textures. It also won't need updating for EPs/patches, and should work fine with all game versions now and in future.
All of my tiny texture replacers are available in one .package file, for your convenience. You may download either the single files, OR the combined file - not both!
Link: Tiny Texture Replacers Combined
Peter, Inge, Delphy, Echo, and your mom.