In a clinical setting, a curious twink 'doctor' introduces his straight friend to the world of gay sex using blow-up dolls. The 'patient' is hesitant at first, his cock soft and unsure. The 'doctor' gently coaxes him, stroking his shaft until it hardens, then guiding it into the doll's tight, welcoming hole. The 'doctor' follows suit, their cocks sliding in and out in tandem, the doll's body stretched and filled by their eager twinks. They switch roles, each experiencing the dual pleasure of being both the penetrator and the penetrated. Their moans grow louder, their movements more urgent, as they chase their first gay orgasms together.