It's the same for me – both sexy or romantic expressions can easily get awkward in any language, but for me it's much worse in my natlang Swedish than in English. Similarly, when I write song lyrics, I find it easier in English. It seems that things just generally sound more awkward in Swedish and more "cool" in English. If I would try them in German (which I learned later and am not quite fluent in), that would probably be even more awkward.
I wonder why this might be. Is because English is somehow an inherently cooler language? Seems maybe a little unlikely. Does it have to do with when you learn it – maybe things you learn in early youth seem cooler than things you learn as a baby or teenager? Maybe it's to do with level of fluency – maybe I just don't notice it as much when I say awkward or cliché things in English? Or is it because I associate English with cool media like films and music?
What are your experiences? Which languages are cooler or more awkward than others?