Evaluating Sexual Psychoeducation in Couples With Sexual Desire Discrepancy

Inclusion Criteria: 1. Be a couple; 2. Be in a romantic relationship for at least one year; 3. Be 19 years of age or older; 4. Experience perceived and/or actual SDD with personal and/or relational distress reported by at least one partner; 5. Be fluent in English; 6. Be willing to participate in 8 weekly online treatment sessions; 7. For couples in long-distance relationships, be able to meet the partner in person and via video call to complete the couple's homework; 8. Be willing to abstain from starting any new treatment for SDD for the duration of the study; 9. Be willing to voluntarily complete questionnaires administered before, during, and after the treatment; 10. Have access to an electronic device capable of running Zoom platform (if randomized to STEP-T); 11. Have a stable internet connection. Exclusion Criteria: 1. Cases where the discrepancy is attributable to at least one partner identifying as asexual (asexuality is not considered a sexual dysfunction; APA, 2013); 2. Presence of untreated psychiatric conditions at the time of recruitment (e.g., depression) that would interfere with participating in the treatment and homework; 3. Receive dyadic psychosexual treatment for SDD elsewhere during the study period.