An omega sexually is not a term that has a clear definition. However, the term "omega" is used in the context of Omegaverse, which is a subgenre of speculative erotic fiction that focuses on wolf or other canid-like behavior in humans, especially as it pertains to sexual intercourse and sexuality. In Omegaverse, "omega" is a term used to describe a submissive and gentle character who is calm and a peacemaker. In this context, male omegas are often envisaged as being able to become pregnant via a uterus connected to the rectum, and they have self-lubricating anuses to make penetration and impregnation easier. It is important to note that Omegaverse works are fictional and not based on real-life sexual identities or behaviors.