How-to Has a laid-back Hookup Carefully? Lowell attends the girl long-time pal Whitney’s engagement luncheon in downtow Aren’t relaxed hookups liberating? No soul-searching, no engagement, no obligation. Only pure, unadulterated nirvana. Except that’s only partially real. Certain, busting free was hot. And damn, will we like operating all casual about any of it. However when …