Follicles are usually about 2/3 to 3/4 down from the head. A lot more than a couple inches up from the vent. To feel follicles let her crawl through your hands and start feeling her belly about half way down with decent pressure. Most of the time the female will slow down and kind of walk her body around your fingers when you get to the follicles. That's when you know you're in the right area. Just keep feeling until her belly gets squishy again.