The curious straight buddy's eyes widen as he watches his friend's asshole clench and relax, ready for his cock. He pushes in, inch by inch, feeling the tight heat envelop him. His buddy's moans fill the room as he's fucked, his ass stretching to accommodate the thick girth. The curious straight buddy grips his buddy's hips, slamming into him, driven by primal instinct, until they both explode in ecstasy.