Are two condoms better than one for protection from pregnancy/STDs?

I hope you have not been using two condoms! The heat created by the two condoms rubbing together could do you some serious harm. One condom is enough for protection from pregnancy and STIs. I use the term STI (sexually transmitted infection) because you can have an infection and pass it on without it becoming a disease (thus the term STD) in your body. If you want to protect yourself during foreplay you could use dental dams as well to have safe oral sex.