You can use this mod:
modthesims.info/d/596028To make it work, you need to turn your sim to the side (
not in detail edit mode) and then click on the ear and drag out.
Or if you want your sim to have their ears to a point but one where it like... Curves up into the point as opposed to normal ear shape and then into a point if that makes sense. Like the vampire ears (they don't have to be a vampire), then you should download this one:
modthesims.info/d/588257I downloaded the first version of it where you can go into full edit mode and then change your sims ears. It can work alongside the other mod I posted and can pass on pointed ears to children (I think.) If you download the other versions of the mod, it basically adds already pointed ears that you can select when you choose a ear so you don't have to always edit your sims ears to be pointed, you can just choose a preset and be done. But I don't use them because they can show up on townies (randomly generated sims) and I don't want that. The slider ears only happen if you go into CAS and physically pint the sims ears, it won't happen randomly. I think.