Actors have to kiss people they don't know and hug them and rub against them, no matter how unclean they may be because that's acting apparently. Two actors might meet thirty seconds before an audition and then have to make a room full of dour-faced industry professionals believe that they've been married for ten years. Even if the other actor has bad breath, unwashed teeth and an unfortunate odour problem, you will need to convince a room of people that you want to rip his clothes off. No amount of drama training can prepare someone for that.
