Kabbalah for Yoma 70:11

One needs to persist in Teshuva year after year, and never forget how many times he angered his Creator, because all his sins are counted and written. If he does not (remember) then the Lamed-Yud Angel is ready to redeem back the same amount of sins he committed by warming himself up between her thighs—there he will fall and there will be no room until all the evil will be destroyed—since the Creator gives strength to the wicked to suffer their calamities, and for each and every warm arousal they are redeemed anew. The reason is as it says “To lie with her to be with her” (Genesis 39:10), and they say about it: “to lie with her” in this world, “to be with her” in the World To Come until he receives his punishment, as Rabbi Shimon Bar Yochai explained his punishment in Pekudei 853, and study it because we will not quote it here. Therefore, his Teshuva is difficult since he needs to do Teshuva for each and every time that he boiled himself by emitting semen in vain.