Using a tissue to catch semen during masturbation is generally safe and common. Many people find it convenient to use a tissue, paper towel, or washable cloth to catch the ejaculation for cleanliness.

Here are some steps and tips to keep in mind:

• Choose the right tissue: Use a clean, soft tissue or paper towel to avoid irritation on the skin.
• Be gentle: The skin around the penis is sensitive. Avoid using tissues with rough texture to prevent discomfort.
• Hygiene: After ejaculation, wrap or dispose of the tissue immediately in a trash bin. Avoid flushing tissues down the toilet to prevent plumbing issues.
• Wash your hands and genitals: It's important to wash your hands and genital area with warm water and mild soap after masturbation to keep clean and prevent infections.
• Consider washable cloths: Some prefer using a clean cloth or towel that can be washed afterward, which is environmentally friendly.

Overall, using a tissue is a simple and effective way to keep the experience tidy. Just ensure you maintain good hygiene practices to keep your skin healthy and reduce the risk of bacterial growth.