finally, someone figured it out on their own

coworker (visiting from his out-of-state telecommuting home office) : hey, you're looking good, you been working out?
me : yep
coworker : and i guess the haircut wasn't for a new job, huh... <his eyes widen> girlfriend?
me : <grin>
coworker : hey, you're blushing!
me : <bigger grin>