You can’t read.
ACS site says: Infection with HPV increases the risk of developing anal cancer.
Increasing risk and causation are not the same, pal. Try and preach elsewhere. If cancers were 100 percent due to lifestyle, then evil, debauched perverts would have horrible cancers - pedophiles would all have penile cancer or other sexual cancers, but it is not so. Behaviors do have consequences and there is no doubt but you are stretching so far, you must be Gumby.