A man having lots of sex with his wife is not an embarrassing thing.
A woman talking about having lots of sex with her husband, and comparing it to motorcycle riding, at a wedding alter is an embarrassing thing, i.e. it's really bad writing. And if it's meant to be serious, then those would be embarrassing characters.
It's just Jerry Springer type stuff, which is why it gets called out repeatedly on boards.
Not talking about the technical aspects or the execution. The game may also be a blast. But regardless of context, that dialogue is just bad any way you slice it. It's really not that big a deal though. I mean I thought Metroid Other M was an ok game, but every time Samus started talking I was looking over my shoulder to make sure the room was empty. The last thing I wanted to hear was "just what the hell are you playing?"