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.
It is much better to mow when the grass is dry because when it is wet it just gums up the blade and accumulates under the deck of the mower, decreasing the effectiveness. Sometime try this experiment: mow part of your yard when it is dry, then using a good sprinkler water the next section well for 30-45 minutes.