Transgender male (TM) is the minority and difficult to reach-up group. Therefore, there is a lack of research on private issues involving TM, such as sex, eroticism, and sexual risk behavior. This study focuses on TM as the research participant, based on Milton Mayeroff's caring theory, to understand the TM's erotic culture and the sexual risks behavior, to evaluate the need for subsequent sexual health care. The research method is a mixed methods research of explanatory design, which recruits participants through purposive sampling and respondent-driven sample (RDS) methods. The first stage is an online questionnaire survey. A total of 321 TMs were recruited. The time of online questionnaire is about 10-15 minutes to get a preliminary understanding of the erotic and sexual risk experience of TM in Taiwan. In the second stage, focus groups and in-depth interviews will be conducted, 2 hours of each group and interview. A total of 29 transgender man and women, and non-binary participants were recruited. The recruitment will be stop when the data are saturated. The analysis of both quantitative and qualitative data can get an in-depth understanding of sex, eroticism, and sexual risk, and violence experiences of the participants. The research results are important for improving the awareness and identification of sexual risk and the assessment of sexual health care needs of TM in health care profession. The results also serve as a reference guide for the development of care needs on sexual health care and anti-violence of transgender people, and for the implement of a gender-friendly environment for medical care.

First stage:

Inclusion Criteria:

1. People who used to or currently self-identified as transgender men, regardless of whether they have sex reassignment surgery.
2. Be over 20 years old.
3. Citizen and live in Taiwan.

Exclusion Criteria:

1. Not self-identify as transgender men
2. Younger than 20 years old
3. Not citizen and not live in Taiwan.

Second stage

1. People who used to or currently self-identified as transgender men, transgender woman or non-binary, regardless of whether they have gender-affirming surgery.
2. Be over 20 years old.
3. Citizen and live in Taiwan.

Exclusion Criteria:

1. Not self-identify as transgender men, transgender woman or non-binary.
2. Younger than 20 years old
3. Not citizen and not live in Taiwan.

Gender:transgender men

1. The personal network of the research team is used to search for eligible TMs via social media platforms, such as Facebook (FB), Instagram (IG), and group of Line app.
2. The recruitment materials will be published on transgender communities, social media platforms, non-governmental organizations, and YouTube, etc., to recruit the participants.
3. The participants who finished the online questionnaire will be encourage to invite and transfer their network who meet the inclusion criteria via Line app or email address to our research team.

Transgender individuals. The "Age" data were not collected for participants in Stage 2.

Quantitative Research: From the point when research participants signed the informed consent and completed the questionnaire to the distribution of vouchers, we tracked participants for approximately one year, with no adverse events reported. Qualitative Research: From the point when research participants signed the informed consent and participated in focus groups to the distribution of vouchers, we tracked participants for approximately 6 months, with no adverse events reported.

Due to the cross-sectional non-interventional nature of Stage 1, participants will not be at risk for Serious Adverse Events, at risk for All-Cause Mortality, and at risk for Other (Not Including Serious) Adverse Events.

Stage 2 underwent manual evaluation and follow-up, and no adverse events were reported.