Any plan that involves Cal continuing to kiss Sherlock is a good plan, and one Sherlock supports!

Nevertheless, there's something holding him back—some instinct that says giving in to his impulse to slide into Cal's lap would be a bad idea. With so much of his usual analysis suspended, he doesn't follow it to the root to find out why. He just shifts a little closer on the couch instead, stroking the back of Cal's hand with his thumb.