Yes touching yourself is a Sin.The body is meant to glorify God not our own lustful desires.God Bless
1 Corinthians 6:12-13 "Everything is permissible for me"but not everything is beneficial. "Everything is permissible for me"but I will not be mastered by anything."Food for the stomach and the stomach for food"but God will destroy them both. The body is not meant for sexual immorality, but for the Lord, and the Lord for the body.
1 Corinthians 6:18-20 Flee from sexual immorality. All other sins a man commits are outside his body, but he who sins sexually sins against his own body.Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your body.
Ephesians 5:3 But among you there must not be even a hint of sexual immorality, or of any kind of impurity, or of greed, because these are improper for God's holy people.
Colossians 3:5 Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed, which is idolatry.
1 Thessalonians 4:3 It is God's will that you should be sanctified: that you should avoid sexual immorality;