[First couple] The man gently caresses his girlfriend, asking her for various acts such as blowjob and handjob. Matching her reactions, he brings her to a numb, unresisting state, then actively initiates intense intercourse with positions resembling those in adult videos. [Second couple] The man mounts his girlfriend without showering or bathing, carefully building arousal through prolonged foreplay, which she reciprocates. They experiment with various positions, enjoying each other's responses, clearly showing their relationship deepening. [Third couple] The man struggles to undress the woman, and his foreplay ends quickly. However, during sex, she happily follows his lead, changing positions and responding well, allowing him to successfully elicit strong reactions from her.