It wasn't always this way. But once I started concentrating on infrared photography... it just comes with the territory. Why? because "infrared" portraits comes with some random wonky weirdness at times and you can't always predict it. Like eyes. sometimes and often people's eyes just look a little weird, or alien and you have to spend time to fix it. Specifically - the whites of the eyes go medium gray, and sometimes have rings around the iris. Then there is skin, it almost always turns a statue like white, but veins can show up; on the chest, hands, legs, arms. And it's random and dependent from person to person, and changes in different lighting. Clothing changes from dark to light - sometimes, often but not always. It's always a mystery what wardrobe will do until I shoot it and look at my LCD screen.
But I LOVE working with infrared. Love it love it love it!! I like shooting in color, but it doesn't make me jump with excitement. But I really enjoy black and white work too. I freely admit, and am proud to say I am really a mono-tone photographer. (I can't say black and white because I tend to keep my infrared portraits with a slight tone)
But I'm rambling.