Effectiveness of Relationship Education for Reducing HIV Incidence in Men Who Have Sex With Men

The investigators will conduct a randomized controlled trial (RCT) with 5000 HIV-negative individuals, anticipating half of the individuals will have a serious partner, and half of those partnered individuals will enroll with their partner. After completing the baseline assessment, participants will be randomized to either the all2GETHER intervention package or follow-up only control, and they will be followed 24 months post-intervention. Only individuals participating with their partner will receive dyadic skills coaching sessions, while single and individual partnered MSM will receive the upgraded all2GETHER web app program only. all2GETHER web app delivers all core intervention content and uses diverse media (e.g., videos, interactive activities, quizzes) to deliver relationship education (e.g., effective communication, conflict resolution) and HIV prevention (e.g., behavioral/biomedical prevention, relationship agreements).

Eligibility Screening. Participants will be recruited via paid advertisement on traditional social media (e.g., Facebook, Instagram), geospatial dating apps (e.g., Grindr), and organic social media engagement (e.g., posts in Reddit threads). Online screening - online recruitment materials will be linked directly to the online eligibility screener. Potential participants will be greeted with a brief description of the project and will be asked if they are willing to answer some questions to assess their eligibility. Participants who meet initial eligibility criteria will be shown a message telling them that they are preliminarily eligible for the study and asked to provide their contact information. Those participants in a relationship will be asked to provide contact information for themselves and for their partner. If they do not consent to give contact information for their partner, the participant will be responsible for ensuring the partner also completes the screener. The investigators will make every effort to enroll the dyad - if partnered individuals cannot enroll their partner, they may participate as individuals.

Individual and Couple Confirmation. For couples - staff will confirm dyads as an actual couple, which involves separate calls to each partner with a series of questions about their relationship. Upon determining eligibility, and whether participation will be individual or dyadic, participants will be emailed a link to informed consent and baseline self-report questionnaire.

Baseline Assessment. Eligible participants will receive a link via email to access the online informed consent and baseline survey. Informed consent (assent for 16-17 year olds) will be completed just prior to completion of the baseline self-report questionnaire, via REDCap. Participants will be presented with the full online consent form. If they consent by clicking the 'I Agree' button at the bottom of the page, their consent will be recorded in our database. After obtaining consent/assent, participants will complete the baseline survey, which will take 45-50 minutes to complete. After completing the baseline survey, participants will be mailed HIV/STI testing kits. Participants will self-collect specimens using our team's established procedures, and return specimens for processing.

Randomization. After completing the baseline assessment, participants will be randomized to either the all2GETHER intervention package or follow-up only control, and they will be followed 24 months post-intervention. The all2GETHER intervention package will be tailored based on 2 decision rules: 1) Relationship status and (among partnered MSM) 2) individual v. dyadic participation. Only dyads will receive dyadic skills coaching sessions, while single and individual partnered MSM will receive the upgraded all2GETHER web app program only. Participating dyads will further receive 2 individualized couple sessions focused on skill implementation, emphasizing communication and problem-solving (Session 1) and sexual health (Session 2).