Requires Vampires, and I recommend this one if you have both GTW and Vampires. Allowed for random and townie generation with a chance of about 50%. EarPresets GP04 Random - An optional addon that unlocks the Vampire presets to show in CAS for humans, so you can also select the various options.The ears will not appear as presets in CAS but can be directly created and edited by zooming into 'detail edit mode' khitsule_pointy_ears - This is the main mod that unlocks direct manipulation of ears and are genetic.You must zoom into detail edit mode and manually grab the ear to access the sliders if you don't see presets. Spellcasters and mermaids have pointy sliders enabled by default (EA) so this will not be updated for them.
Since this changes the modifier min/max values to be the same as aliens they are genetic and may appear on townies - see versions for more information on random chance. Simple mod that enables pointy ear sliders on human sims, under 'detail edit mode'.