Why are women fascinated by men getting pregnant or having periods?

The type of male pregnancy where a man gets a real babyeum inside them.<br><br>I'm not talking about a man looking at his bloated tummy and being like "I'm pregnant"<br><br>I'm not sure how common it is, but it seems like I see women getting excited over the idea of this in a lot of online communities like IG reels and TikTok