it's easy to tell which clone of dottore is touching you, even when you've been blindfolded. all of them have hands that are surgically precise - despite their love of bad practices and unfathomable experiments, the various dottores actually do know what they're doing. it's just not as important as getting the result, sometimes.
dottore prime, the oldest, has rough hands. they're scarred from years of 'hands-on' experiments, the subjects of which often fought back. they're scarred enough that you can make them out through his thin gloves when he runs his hands over your thighs.
the dottore who spent time in mondstadt has smooth hands. you could even say they were soft, this dottore preferring to have others do his dirty work while he takes care of the less taxing tasks. he, too, cares the most about his appearance. he's careful not to sully his plain but expensive white gloves... unless he's running them through your slick, eager to see how you're reacting to his touch.
dottore omega's hands are always unnaturally cold. you swear his fingers feel even longer, though you didn't know of him genetically modifying his clones... still, he touches you languidly and drags his fingers for what feels like forever down your body, touching you in ways that feel good but are never enough.
touching you seems to be the only time that the clones get along, each of them offering their own ideas of what to do with you, their favorite experiment.