A dental dam is a square piece of latex about five inches on each side available at dental and medical supply stores. And since it can be hard to find dental and medical supply stores, you can also use plastic wrap, available at your local grocery store. If you're having oral sex with a guy, be sure to use an unlubricated condom. Asking my partner to put on a glove is very erotic. I'm expressing my desire for her to touch me.
Safe sex is a turn on.
That's especially true if you have a cut or rash on your hands. If you're sharing a sex toy with your partner such as a dildo make sure to put a condom on the toy, and change condoms in between partners. Or, if you have a toy made of silicone, you can boil it for 3 minutes to sterilize it in between partners. When I'm ready to lose my virginity, I will make sure to be safe about it. And other activities avoid direct genital to genital contact.