The kiss went exactly as he was hoping, and he offers no resistance to being moved bodily around. There's a groan when his back meets the wall, not entirely of pain. He'll press one long limb against Billy's hip, not quite wrapped around, to avoid restraining him. It's a half hold as much it was adding friction to areas clearly deprived of that.

Fucking? Who said anything about that? This is all just innocent fun...

Until blood gets involved. Sylar moans with clearly erotic enjoyment and thrusts up against him. While his tongue moves against Billy's, tasting the older gentleman as well as his own blood, he drapes his hands lazily over Billy's shoulders. They move further, reaching down to the middle of his back. From there back to the shoulders, Sylar drags his nails, digging in hard enough to draw blood.