Leo, the experienced top, guides Mark, the innocent bottom, through his first anal experience. Leo's thick, veiny cock pushes against Mark's puckered hole, making Mark's body tense. Leo whispers reassurances, coaching Mark to relax and push back. With a pop, Leo's head slips inside, making Mark gasp. Leo's cock stretches Mark's hole, filling him completely. Leo starts to move, slowly at first, then picking up speed as Mark's moans encourage him. Mark's own cock leaks pre-cum, twitching with each thrust of Leo's dick. Leo's hips slap against Mark's ass, the sound of flesh meeting flesh echoing in the room. Mark's hole clenches around Leo's cock, pushing Leo closer to the edge. Leo pulls out, leaving Mark's hole gaping and dripping with lube, ready for more.