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.
To avoid these problems, mow your dry lawn early in the morning and water immediately afterward. Sometimes mowing your lawn can help you notice it's time to water the grass. This is because dry grass shows footprints after you walk across it. After you mow the lawn, stand back and scan the grass for footprints.