If you wear makeup during practice, you will soon find it all over the mat and other people. Safety Please take jewelry off before practicing. This includes earrings, necklaces, watches, etc. All foreign objects have the potential of hurting you or someone else. Please keep your fingernails and toenails trimmed.
Long nails are dangerous, because they can easily cut other people.
The club has nail clippers you can use. Always strive to avoid accidents. When you practice aikido, pay attention to your surroundings so you can avoid colliding with other students. Then resolve to pay better attention next time. Even if you didn't cause the accident, chances are you could have prevented it.