You have massive diarrhea all in your bed leaving a puddle on the mattress and sheets. You then proceed to throw your partner into the puddle and FUCK or have intercourse all in the puddle of "butt mud". Hence, Mud Puddling!
Man my stomach has been sooo upset today. I think I'm going to go home and enjoy a good hour of Mud Puddling with the wife/husband!
When a male hangs out with grannies at nursing homes (often under the disguise as one of thosevolunteers who go to nursing homes to cheer people up) just to screw them when noone else is around (often times the older women really love it or are too out of it to really care).