The doctor's skilled hands rove over the twinks' pristine forms, tracing muscles, teasing erect nipples, and lingering on their throbbing cocks. He whispers instructions, guiding them to stroke their virgin lengths, pre-cum beading at the tips. The air grows thick with the scent of their excitement. The doctor's breath hitches as he probes their tight assholes, the first intrusion sending jolts of pleasure-pain coursing through the twinks. Their moans echo, begging for more as the doctor's professional facade crumbles, revealing a lustful beast eager to claim their virginity.