Dolphins are one of the few animals other than humans known to mate for reasons other than reproduction and especially male Bottlenose with other dolphin species.
Aggressive behaviour is rarely observed, but it may have a large impact on the relationships, it’s found that males are more aggressive than females, and use sexual coersion during the breeding season, though the bottlenose may also be submissive in such encounters. Female bottlenose dolphins are highly tolerant of all this, as they haven’t been observed acting aggressively towards juveniles or adults of either sex. Though female aggression is extremely rare, but females receive aggression more often
Occasionally, dolphins will also show sexual behaviour towards humans as well, so watch out when Dolphins are about.