Everyone needs to eat and drink. We do it every day. However there are certain times that our hunger or thirst is masked by something else.
At the risk of sounding gross I will say that the something in question is the need to relieve ourselves. Stay with me and I will make my point. When you have to go badly you would never think of guzzling down a glass of water. The same goes for eating a meal when you know that an extended stay in the facilities is required. We cannot enjoy a meal when our body needs to relieve itself of waste.
Even though we would not miss a meal purposely (let alone for a day), many try to go a whole week on one meal spiritually. We sit at church gorging ourselves with what is offered, only to return with a empty stomach (spirit) the following Sunday.
We should pay close attention to the physical needs of our body to understand the spiritual needs of our true selves. Our walk with Christ should be an ongoing time with a close friend that lasts throughout the day. Meals are intimate. No one sits with strangers at a restaurant. We eat with those we are close to. To sell God short by meeting with him once a week is a tragedy. It is also a shame to box him into a small section of each day (devotions). We should be seeking him throughout the day, just as we eat when we are hungry.
This brings me to the waste. When we have sin in our lives it is difficult to fellowship with God. Our bodies give us a clue as to how we should deal with sin. Flush it! There is no way to enjoy a meal (interaction with God) with sin in the way. My advise is simple: Relieve the waste and enjoy the meal. There is simply no room for spiritual constipation in a relationship with God. If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness (1 John 1:9).
How long has God been waiting for you to acknowledge him throughout the day. He doesn't want your Sunday, or five minutes--He wants you, yielded and open. He desires the intimacy of the meal to be shared between friends. Jesus said, "Here I am! I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with that person, and they with me (Revelation 3:20).