Perms and hair color. You can color hair that has been permed, but try to use a semi-permanent or 'no-ammonia' color instead of a normal permanent color (which uses ammonia and 20 volume peroxide). Have your hair permed first.
Mowing grass works best when the grass is dry, as grass tends to bend over from the weight of the rain, making it difficult to get a straight cut. It also clumps inside your mower cavity and on your lawn, which can lead to dead grass underneath the clumps if not raked promptly.
Allow all grasses to grow taller in summer and during drought. Mow warm-season turf shorter in spring to remove dead grass blades. Mow cool-season grasses shorter for the final fall mowing in snow prone regions to help prevent snow mold. Allow grasses growing in shade to grow taller.