In fact, the entire secret technique isn't just about massage, nor is it a purely lewd practice.
Firstly, it certainly has the function of strengthening the body; secondly, it can make one's senses become acute, intensifying and amplifying pleasure, which then can expand other faculties, pushing sensory abilities beyond their limits.
As for other abilities, Chen Mo doesn't have full knowledge yet; he hasn't truly mastered it.
Yan Peipei might know more, she is somewhat special in certain respects.
Thereby, if Chen Mo just performed the massage, he felt it wouldn't be a loss.
Su Yan tossed the card back to him, "Take this, and come upstairs with me."
"Wait, Miss Su, I can just give a massage, I don't have to take your virginity."
Chen Mo was still considering her. Being with a beautiful woman is delightful, but a moment of pleasure could bring dire consequences, and Chen Mo wasn't one to think with his lower half; he wasn't short of beautiful women.