Several subspecies of dolphin have gay or bisexual dolphins. One researcher discovered the incredible seventeen-year gay relationship between two male dolphins. Researchers have also found pods of all male dolphins who share sexual and romantic experiences together. Dolphins are known to be highly flirtatious and sexualised.
Male dolphins have been known to engage in masturbation of other males. Same-sex dolphins engage in long foreplay, with the sexual act only lasting a short time. Male dolphins regardless of their sexuality tend to be aggressive and violent towards the other during sex.