We had a great talk from an HPV expert at Jo's Trust Let's Meeet at the weekend. Yes your partner can keep passing it back and forward BUT the vast majority of people will clear the infection from our system. So if you look at it like the cold virus, you can keep getting colds and they dont cause any major issues. Just because the HPV infection caused problems first time around it does not mean the next time you get it you wont be able to clear it from your system without any long term effects. The only true way to not become reinfected with HPV is to never have any sexual contact ever again with anyone and that is just not realistic.
My story would point to me having a persistent HPV infection which my body cannot shift however I am in a minority and most post CC girls can and do clear subsequent HPV infections.