Why do people carry so many handset at a time

It is always difficult for me to carry more than one handset at a time.
Good enough, some phones now have double sim, making easier for
for us to have two lines on one phone.

But You still see people carrying 5 to 10 handsets, struggling with them.
I got more worried when i saw this WOMAN carrying 5 phones,
I though it is only the ibo guys at Alaba market that are guilty of this but...........

So how many phones can u carry at a go?