It's probably pretty telling that Cisco feels an acute sense of relief when Matt mentions he knows about the ambient light level in the bedroom because Foggy's slept there before, not because his former (or current) lovers have told him so. It obviously doesn't mean that Matt hasn't taken people to bed since he's moved into this place, but Cisco's brain latches on to the information and runs gleefully away with it anyway.

He's about to comment on it (or tease Matt, maybe, about the sexual tension between him and Foggy), but then Matt reaches out and catches Cisco by the wrist, a quick, easy movement made without even the slightest bit of fumbling, and pulls him into a kiss. Cisco's mind goes completely blank the second Matt's lips find his, all the quips and contemplations alike falling into the ether, every synapse dedicated to feeling and tasting and experiencing this moment.

This is only their second kiss, but Cisco's already in love with Matt's mouth, his sweet, bee-stung lips and his perfect, straight teeth. Matt kisses like someone whose aim is to make an art of it, slow and gentle, searching and discovering. It's like Matt can read Cisco like a book, learning what Cisco likes so fast that it makes Cisco dizzy, his lips tingling and his heart racing. Cisco's hands find Matt's back, palms sliding over the fabric of his clothing, feeling the strength of Matt's muscles beneath the layers, bunching and flexing as his mouth works over Cisco's, very quickly taking him apart.