It can work, but it has to have some relevance. Dick pics that compare size, like your hard cock next to a can of Red Bull is endlessly fascinating to me lol.
Or
Your dick next to a pic of mine....hot. So so hot, makes me all melty inside.
this is a new thing for me, a couple of guys have done it and I never realized how awesome it is!
Or
Your dick next to a pic of mine....hot. So so hot, makes me all melty inside.