[The effect is pretty much instant - Dave moans into the kiss, sloppy and unfocused and just feeling too good to focus enough on how he's kissing, resulting in more cuts along his tongue, more candy-red blood smearing on their lips. He keeps his hands on Tav's horns, realizing they provide a pretty good leverage point for bucking himself forward into Tav's hand, and then back against that ridiculously amazing bulge.]
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