Sexual sins were considered especially difficult to treat in confession because of the reticence of the confessants (
Arcuri 2018, 83). The confessor should strive to build trust, advises Baltasar de Rienda, a parish priest in the province of Granada: without a complete confession, the spiritual medicine of absolution cannot be administered (
Rienda 1662, fol. 33v). However, the confessor should only pose the questions necessary to assess the type of fornication, simplex or other (
Azpilcueta 1556, cap. 16 no. 4, p. 161). The precise number of occurrences is not required (
Vitoria 1561, Sacr. Poen. q. Numerus, fol. 135v). Azpilcueta warns against inquiring in too much detail, as this endangers the confessor himself as well as the penitent (
Azpilcueta 1556, cap. 16 no. 4, p. 161). Taking communion after an unconfessed fornication is highly irreverent, but no mortal sin in itself (
Vitoria 1561, Sacr. Euch. q. An pollutio, fol. 56r).