Sexual orientation is a private matter that individuals can decide to disclose or conceal. Nevertheless, when interacting with others, people look for cues of sexual orientation. Hence, the person’s face, voice, or non-verbal behavior is taken as a cue revealing sexual orientation. As research on “gaydar” has shown, this detecting ability can sometimes be accurate or stereotype-based. Sometimes gay, lesbian, and bisexual people themselves intentionally communicate their sexual identity explicitly or through more subtle cues. Intentional or not, several cues are taken as communicating sexual orientation with the consequences of shaping interpersonal interactions. Identifying someone as gay or lesbian has several implications. On the one hand, it leads straight men and women to non-verbally behave differently than when interacting with other straight individuals (e.g., more physical distance, more self-touching). On the other hand, it also affects verbal communication (e.g., topics of conversation, questions, and statements). The harshest consequence is hate speech and homophobic language. Research has shown that being labeled as “faggot” or “dyke” not only negatively affects those who are the target of such verbal derogation but also negatively impacts on straight bystanders. Indeed, gay and lesbian targets of homophobic language report a lower level of well-being and self-acceptance, while being exposed to such language increases prejudice toward gay men and lesbians among straight people. In the case of straight men, the use of homophobic language is often associated with identity self-affirmation and self-presentation. Interestingly, a recent trend among gay people has been noticed: they use homophobic labels among them as a form of “reclaimed language,” meaning that these derogatory terms are used with a different intent and reframed in a more positive way. Moreover, communicating sexual orientation can increase self-acceptance, social support, and positive social comparison among gay men and lesbians and can also increase positive attitudes toward gay people, especially when it happens with friends and family members.