Which sins do these canons refer to?

[Jean65]

In the canon law, the canons 977 and 1387 talk about sins against the 6th commandment? Are ALL the sins against this commandment concerned or only a few sins? (sexual relations or impure jokes for example?) Wich sins do these canons refer actually to?
Thanks for your answer
In Christ

 

[Fr.Charles_Grondin]

Can. 977 The absolution of an accomplice in a sin against the sixth commandment of the Decalogue is invalid except in danger of death.

This canon is stating that if a priest has an affair with someone, the priest cannot forgive that person’s sin in the confessional (unless the person is in danger of death).

Can. 1387 A priest who in the act, on the occasion, or under the pretext of confession solicits a penitent to sin against the sixth commandment of the Decalogue is to be punished, according to the gravity of the delict, by suspension, prohibitions, and privations; in graver cases he is to be dismissed from the clerical state.

This canon involves a priest soliciting someone for an affair during the sacrament of confession.

Both canons refer to the 6th commandment as a sexual relationship between a priest and another person. A priest telling a sexual joke, while highly inappropriate, is not something that these canons are referring to.