Can someone tell me what's going through his mind?

Can someone tell me what's going through his mind?
I don't know if he's gonna ask you for massage, but im sure your bf wont be too happy about it.
Okay, so it's me and my best friend. I'm a 19 year old female with a 21 year old boyfriend of 5 years, and he's 18 with a 17 year old girlfriend of 1 year. I was giving him a back and shoulder massage while he was playing some flash game at his desk. Got tired so I sat on the floor next to his chair, and started giving him a calf massage. Worked my way down and up his lower leg, and threw in a knee massage as well. Figured I'd do the other leg too, so I kind of sat under his desk and did the same to the other leg. Only this time, I started massaging his lower thigh. He sat back, like he was enjoying it, and had his arms folded across his chest. We were both watching his roommate play a computer game, but he periodically looked at me. I ended up laying underneath his desk with his foot on my stomach. He laid back in the chair, head tilted back, arms still folded across his chest, eyes closed, mouth slightly agape, whilst I gave him a foot massage. Took at least 15 minutes on each foot.
I smirked, thinking this probably felt amazing, and feeling cocky that I was doing what most people pay good money for (I've been told I have magic hands). I kept looking up at him to see his facial expressions, he winced a few times but in a good way. I walked on his back once, because he preferred deep tissue and I don't weigh that much, so I didn't feel the need to hold back pressure-wise. He looked like he was enjoying it.

Can someone tell me what he was thinking throughout this? Keep in mind that he jokes and kids with me on a regular basis, calling me "mean" names (he can be a jerk sometimes). On a scale of 1-10, how much do you think he enjoyed it? I told him that he could have a massage whenever he wanted one. Do you think he'll take advantage of my generous offer?

What do guys think?

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