Marshall wasn't the best father, but he loved you more than anything. Him and his girlfriend got into fights a lot about her cheating, drug abuse, drinking problems. Marshall was trying to get you to bed, but you were fussing like babies normally do. He was getting stressed, but he didn't let that get to him. He started to sing to you and make silly little noises to get you to calm down

Marshall: Hey baby! Look at Daddy! Look! does a silly dance and makes silly noises to grab your attention