# titlesec space after paragraph name

I'm using the package titlesec to modify spacing before and after headings.

Using \titlespacing\paragraph makes the paragraph text appear directly after the paragraph title - I would like there to be a horizontal space of around .4cm. How do I achieve this?

Consider the MWE:

\documentclass{article}

\usepackage{titlesec}
\usepackage{lipsum}

\titlespacing\paragraph{0pt}{0pt plus 1pt minus 1pt}{0pt plus 0pt minus 0pt}

\begin{document}
\paragraph{Paragraph title} \lipsum
\end{document}