Safety first! Construction workers wear hard hats. Doctors wear scrubs. Soldiers wear body armor. Those kids at subway wear plastic gloves when making your sandwich. They’re protecting you and themselves. On the job you’ve got to protect yourself, too. This is what the condom is for.
Some clients may have their own, but it is a good idea to have a supply of your own. Keep a supply of your personal favorites or options for the clients. If the client does offer their, check it out first. Make sure it isn’t past the expiration date. Make sure the packaging hasn’t been damaged. Also, know the brands and the the difference between latex, non-latex, and lambskin, because while some may prefer the lambskin, it does not offer an effective barrier for most diseases.