I apologise for not finishing or correcting my response. I was interrupted.
Alex, if it’s any kind of the intercourse items you mentioned, then tell the priest that about the sin of sexual intercourse and how many times, but spare the priest intimate details like those you suggested.
Sins involving sexual intercourse, or submitting to behaviour that leads to sexual intercourse, between partners who are not married to each other, must involve determination to avoid such occasions of sin in the future. Absolution cannot be granted if a person does not sincerely intend to avoid these sins or occasions of sin.
From the Catholic Catechism
2353 Fornication is carnal union between an unmarried man and an unmarried woman. It is gravely contrary to the dignity of persons and of human sexuality which is naturally ordered to the good of spouses and the generation and education of children.
A few quotes from the Bible, God’s word:
“Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators…”[1Corinthians 6:9]
“Flee immorality. Every other sin that a man commits is outside the body, but the immoral man sins against his own body…”[1Corinthians 6:18]
"I am afraid that when I come again my God may humiliate me before you, and I may mourn over many of those who have sinned in the past and not repented of the impurity, immorality and sensuality which they have practiced. [2 Corinthians 12:21] .
"But immorality or any impurity or greed must not even be named among you, as is proper among saints. [Ephesians 5:3]
"Therefore consider the members of your earthly body as dead to immorality, impurity, passion, evil desire, and greed, which amounts to idolatry. [Colossians 3:5 ]
"Marriage is to be held in honor among all, and the marriage bed is to be undefiled; for fornicators and adulterers God will judge. [Hebrews 13:4]