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.
After allowing your grass to grow 3 inches high, but no taller than 4 inches, you must stop all irrigation for at least 48 hours. Drying the grass blades provides a healthy environment for clean cuts as the mower moves across the turf -- wet grass becomes tangled and torn during mowing.