The skin on your face, bikini line, and underarms are more sensitive than the skin on your arms and legs. To safely remove unwanted hair from these sensitive areas, you need a grooming device that’s gentle – like this, sensitive precision touch electric trimmer. 3. easy to use, this trimmer lets you do quick eyebrow shaping and touch-ups on the go. 4. hair removal and precise shaping for your delicate body parts. For upper lip, sideburns, and eyebrows. Safely remove unwanted hair from these sensitive areas. 7. the skin on your face, bikini line, and underarms are more sensitive than the skin on your arms and legs.