The only sure way to not get a STD is to abstain from sex. Next would be to be in a relationship with a infection free partner that will be faithful to you.
They were very effective
Flavored condoms for oral are more for protecting against the body fluid contact for transferring STDs. If the guy is clean then there shouldn't be a need for a condom.
Backup
protecting the joint
Following the rule of lawAccepting the legitimacy of the laws that are in placeProtecting minority rights
Yes.
c. protecting a person's personal assets.
protecting personnal assets.Protecting a person's personal assets
Where are "the following"?
There are spermicidal jellies and foams that are somewhat effective for birth control, but these do not protect against STDs. And they aren't effective enough to rely on them. But nothing like an insertable pill. No.
The "safety" in this case is relative. What is called "safe sex" can greatly reduce the chance of getting STDs, which of course makes such practices worthwhile to follow, but you can't really reduce it to zero. In other words, following safe practices is much better (much safer) than not following them.
antitrust laws -apex :)