Everyone sexually active should also get Hepatitis B vaccine - usually a 3 doze series shown to be 90% effective after 3rd shot and lasts 10-15 years.  I had mine gee maybe 10 years ago.

Of course for all STD protection condoms etc should always be used - lots of other nasty stuff like herpes harder to prevent but usually see sores when contagious but not always.  

With all that said, in swinging and sexwork, STD's seem rare even with unprotected sex or those infected are just keeping it a secret can not tell.   But better to be save then sorry.

Of course this relates to girlfriends and dating meetings - it would be illegal to pay for sex so no one should do that in the U.S.  We don't have the freedoms for the large brothels, the latest drive in sex stations with prostitutes in Europe and outcall legal in almost all the world except the U.S.

that is because research that was done believed most of us would have the HPV in our system by then. It doesn't harm you if you are over the age of 26. Even if you have 1 form it can still protect you from the other 3. Some research also show that the shots are not as effective after the age of 26. And your insurance will not cover it if you are over the age of 26. For $400 I will take my chances that it will help me