Any implied innuendo did go over Enjolras' head, he was so focused on the need to prove his point. R's tone however, was crystal clear and E took it as a challenge.
He barely had any time to notice the release of the handcuff, before he was laid out flat on his back, pinned by the sizeable heft of his best friend. E's smaller size seemed to work to his advantage for a change, and he was able to turn onto his stomach and try to squirm out from R's grasp.
"Bastard," he muttered his favourite insult in perfect French.