she 'd imagined him rebuilding the classic vehicle from the ground up , reveling in his weekend endeavor , slaving away in some suburban garage , all hot and shirtless , and sweaty and grease-stained , with his bare biceps pumping under the strain of wrench and tire jack , and his bare back slick with perspiration , and ... and ... well , she 'd just had a pretty good idea of how he spent his spare time , that was all .