there's some logic in what you say but there's big difference between changing locks or installing golden coloured faucet and intimate contact with warm body. I venture to say whole experience will be much, much, nicer if hired guy likes us or at least skillfully pretends to.
They likely thing the same way : ' I don't care if he likes me , let him suck my dick, fuck me, sooner he finishes better for me. Give me money and fuck him and his entire family "