I heard mayo wrapping your hair relieves dryness. Apperantly, it really works and really is good. But I wouldn't wanna do it cuz I don't want my hair to smell like it.

Same with olive oil, I wouldn't want my hair smelling like that so I'll pass.
I use sweet almond oil instead, I don't mind smelling sweet. I don't put it all over my head or anthing though, I just put in on the dry ends of my hair.