I've recently had this idea and I'd love to share it in the hopes that it be possibly made into a hypnosis file.
The idea is this: the hypnotist puts you under and, regardless of gender, gives you the feeling that you are pregnant. There would be a trigger word/phrase that you or somebody else says that causes you to feel pregnant. You can keep this feeling going for as long as you like until another word/phrase is uttered, making the feeling go away.
Some additional ideas include an optional "birth" trigger, and maybe the effect of having cravings.
I'm sharing the idea because, as weird as it is, I would love to be pregnant but I can't because I'm a guy, so being hypnotized into having that feeling would be the next best thing.
Any thoughts on this? :)