I had milk coffee with whole milk or even half and half (this can be a way to get some fat on LE Diet, which you do need at least 25 g per day, and most people need more than that.)
Real coffee is so so so much better than the cheap packet types, those are gross even for veteran coffee drinkers. That having been said, coffee can be a very good...ahem...laxative so that does seem to be one of the side effects.
All I can say is - my 4 boys were when I was drinking tea, my girl was coffee. It may totally be coincidence, but I figure it doesn't hurt to switch them.