It was late. Brennan had been checking some terminology for her book. Muscles weren't as interesting as bones, and concentrating on them could be difficult. Tonight it was harder than usual. She kept thinking about how good Booth had looked today in his French blue shirt.
Finally she decided to study using a different method. She undressed and crawled naked under the covers. Booth was snoring softly as she began to run her hands over his shoulders, where the trapezius muscles met the deltoids at the top of his arm. She ran her palms down toward the biceps and triceps in his arms as he stirred slightly. Then she reached around to his chest, caressing the latissimus dorsi. As she moved her hands across his pectoralis majors he stirred again, groaning in his sleep.
She gently tickled her fingers across the rectus abdominus and external oblique toward the inguinal crease of his groin and down the pectineus and adductor longus along his inner thigh. By now, he was wide awake as she caressed each muscle and outlined their insertion to the bone with her fingertip.
"Oh, God, Bones…" he panted, "what are you doing? It's making me crazy…" He kissed her passionately.
"I needed to study the names of muscles.", she said, breathless from his kiss. "Pictures in books are not as good as live specimens", she said, kissing him again, "and you have excellent muscle definition. I especially admire your gluteus maximus." She grabbed his gluteus and squeezed gently.
"So...I'm an anatomy lesson?", he asked as he kissed her neck. "I think you need to study me more closely. C'mere…" He pulled onto his chest. "What are these called?"
She giggled. "Pecs."
"Full name?"
"Pectoralis major and minor."
"Very good work. You get an A on your lesson. Now….how about some extra credit?"