I'll tell you why--because I'm used to cooking for 8-10!
We had long term houseguest(s) this school year, so I became accustomed to cooking for a crowd. Some adjustment was required when we were back down to our family of eight, but I'm really off my stride with some of these summer days. When one or two are gone, I notice and miss them.
When more are missing (like the three teens for the next several days), I have to force myself to make anything "real". Somehow it doesn't seem worth the trouble for such a "small" group! Five used to be my whole family (long ago in a galaxy far, far away...), so it's amusing how much these meals throw me for a loop.
Tonight's dinner (with Len working late) will be leftovers and/or quesadillas (a popular way to use up the leftovers!). Tomorrow I'll try to be back on track.
Are your plans affected by a few missing children? How about when Dad is not home for dinner?