A dental dam is a latex or polyurethane sheet that can be used during vaginal oral sex or anal sex to protect against the spread of STIs. An outside condom is the best barrier method for penile oral sex.

Here’s how to use a dental dam for oral sex:

1. Open the dental dam’s package carefully. Don’t cut it open with scissors or tear it open with your teeth. This can tear or rip the dam.

2. Unfold the dam, looking for holes or damage that could make it less effective.

3. Lay the dam across the vaginal or anal area. Lube on the dam or natural static will hold the dam in place. During oral sex, you should hold the dam in place to prevent it from slipping too much.

4. After oral sex, fold the dam up, and throw it away.

An outside condom can be used for penile oral sex. It should be applied before any oral sex begins. Put the condom on as you would for vaginal or anal sex. Likewise, after an orgasm or ejaculation, you should remove the condom, being careful not to spill any semen.