Bored and restless, you notice your neighbor's window open, revealing a tantalizing glimpse of his muscled frame. He's jerking off, his massive cock throbbing in his hand. You're captivated, your own cock hardening in response. He catches you watching, a mischievous grin spreading across his face. He beckons you in, his hand still working his thick shaft. You can't resist, eagerly joining him for a mutual wank session, your eyes locked on his huge dick as you both edge closer to release.