
I, you, etc. could use something
Colloquial Usage
 Used in casual conversation rather than formal speech or writing. 
After hiking all day, I could use a hot shower.
 Subtle Desire
 Expresses a mild and polite desire for something without demanding it. 
I could use some assistance with these bags, if you don't mind.
 Emotional Connotation
 Can indicate exhaustion or a strong need for rest or relief. 
I've been working non-stop; I could really use a break.