Steve has this feeling that if things continue to go this way he'll be the one that will have to explain certain things to Bucky.  Things regarding arousal, sex, and its related feelings that even Steve isn't able to entirely untangle.  (And he's not sure if he wants to.  Or even if he can.) It had felt good, almost too good to be in close contact with Bucky like this. Cuddling together when they slept in the same bed wasn't nearly the same.  And Bucky felt the same way he knew, even if his friend didn't understand why.    

He stared, mesmerized by the sway of Bucky's hips as his friend stalked towards him like one of those big cat predators from Africa. It was when Bucky got with arm's length when Steve startled out of his stare and rolled smoothly to his feet so that Bucky was no longer towering over him. "It will feel just as good later, I promise. It's not a one time thing."