Ty secretly had a big fascination with non-human humanoid creatures, and it soon dawned on him that the idea of being reborn as the product of alien mating sounded really hot to him. He wished to be conceived by and born to two loving alien parents.
Soon after, in his mind's eye he saw them. Both of them had deep blue skin tones and very similar physiology to humans, besides a few major differences: they each had two horns on their heads (the male had two horns pointing upward from the front of the head, the female two which curled downward from the back of her head), and they had adapted to have far faster and less physically taxing gestation periods than humans. Ty felt his ovum form change too, as it turned from a round ball to an asterisk-shaped one, with receptors for semen all across the body.
As the two aliens started their lovemaking that would lead to Ty's conception, Ty shared in their pleasure. He felt the throb of the male's penis and of the female's nipples and clitoris, and the mutual feelings of arousal as the penis filled the vagina and the female felt the male play with her breasts.
To Ty's surprise, the feelings felt totally detatched from gender- all that mattered was that these mating aliens were pleasuring one another, and their fucking would soon lead to Ty's conception as an alien. Sure enough, when they came he felt both the male's pleasure from ejaculating and the female's pleasure from being cum inside.
As the alien semen swam towards him, Ty wondered what gender he'd be born...