Can couples keep on infecting eachother from the same hpv and prevent immune system from clearing it?

After the infection, your body develops antibodies and most HPV infections typically resolve within 12 months or HPV can enter a latent state. A latent disease can reactivate with symptoms later on but we do not know the trigger. In summary, the mechanism your body reacts with the infection will determine the outcome not because you are infecting each other repeatedly.

There is some indirect evidence that condoms may accelerate disease resolution when both partners have type-concordant human papillomavirus (HPV) infection. However, recurrence or relapse also occurs in 30% without re-exposure, and exposure to one type of HPV does not prevent disease from another type. Overall, re-exposure to the same type you already carry will not change your response