Based on some of the pubic hair styles from my previous mod, here are 5 different styles of 3D underarm hair for CBBE 3BA and BHUNP. You can either build them as part of the body mesh itself with the included BodySlide projects, with both regular 3BA & BHUNP and Vaginaless 3BA and Vaginaless BHUNP options, or you can wear them as accessories.
Update 26/09/2022: The built-in underarm hair version of 3BA was broken as of the 1.01 update, 1.02 fixes it
Note: Most of the hairs may look stretched and weird in certain poses, especially when your character raises their arms straight up:
Edited by donnerwetter