My husband and I never kiss

My husband is the love of my life and we have an amazing marriage. We have two children and are due any day with our third. We are best friends. We have great communication and have sex about 4 Times a week even with myself being so pregnant and in fact our sex lives have only gotten better over the years! We have been married almost six years. I have started to notice lately that we hardly kiss. Hardly ever, some days we don’t kiss even once. We don’t kiss during sex. And if anything, he will kiss me before he leaves for work in the morning, I am usually a sleeping or pretty much sleeping. Is this normal? Anyone else have a great relationship, but just don’t kiss often?