I don't suggest washing a suit unless you are talking about a bathing suit. If so, I suggest washing or at least rinsing it after each wearing to get the chlorine &/or salt out of it.

As to underwear, yep, that's good. But, sweatshirts? Really? If that's your schedule for washing them, I don't want to be anywhere in your vicinity when you get close to your washing point.

Oh, and sheets? Hmmm….I may be a mom, and although we didn't have sheets back in the stone age, I still think a guy who hasn't washed his sheets in a while—well, girls, what would you think about sleeping over?

And, here is some info about what happened if sheets aren't washed more frequently (don't read this if you are about to sit down to a meal or about to have an overnight w/a significant other–or I guess a non-significant other):

"Almost every bed has dust mites, which are microscopic bugs that feed off of dead skin cells. These little things live, die and reproduce in the same bed sheets that you sleep in. The only way to keep these creatures under control is to wash your bed sheets on a regular basis. Otherwise, you may develop an allergy, or even a lowered immune system. As gross as dust mites are, they aren't the only things hiding in your bed sheets. Here's what you also may be sleeping in:

Dead skin cells – Your body sheds about a million skin cells a day, so some of those are bound to come off when you sleep. Unfortunately, dead skin cells are a tasty snack for dust mites.
Oils – Your body secretes natural oils as you sleep, which, of course, end up on your bed sheets.
Sweat – If you get too hot during the night, your body will sweat to cool off.
Bodily fluids – Saliva, blood, urine, fecal matter and bodily fluids from intercourse are all liable to show up on your bed sheets.
Food crumbs – If you like to bring that midnight snack to bed, there's probably crumbs and other food particles that are begging to be eaten by bugs."

Now, generally speaking we women are better at washing things more regularly. But, then, we are women.