Green Tea Neko did lewd dragon comics before it was cool (read before Kobayashi anime). For some reason I cannot find this particular one in english tho.
Take your pick:
"I bet the Fire-breathing dragon is hotter."
"Like sir mixalot, he likes bigger booty."
"Dragon Knights enjoy dragon nights."
"As he makes his choice the dragon is weighting the scales."
/dad jokes
I dunno, an immortal and badass dragon would probably be more fun to be with.