I am in the never place my handbag on the ground, or anything that is not a chair, club. I have been known to uncomfortably sit for hours with my bag behind my back, not leaning on it(!), in a chair at dinner. Not on my lap...what if someone puts something down and it splashes on my bag if it's on my lap?!?!?! Also I have to have it on a little bench between my bed and night table when I am home, especially when sleeping.
I don't know if this counts, and am trying to break this habit, but I have certain items that I never use in my bag that are making it hard for me to downsize. I've just always carried them! I rarely, never, touch up my makeup, except for lipstick and maybe powder but I carry a full makeup kit. Also a few other things. Really trying to get rid of this stuff so I can downsize my bags now that my children are grown. Trying to carry my Chanel Jumbo more.