there's short and there is reasonably long that is easier to maintain and keep healthy. waist length with tangled, stripped hair cannot be attractive. would he consider somewhere between shoulder and bra strap length? what would your niece like? (it is her hair).
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3a, some 2c & 3b, medium texture, porosity normal, low elasticity
washing/cowashing, conditioning, protein tx: curl junkie products
leave in:cj conditioners and treatments as leave in
styling: cj pattern pusha, cj honey butta leave in, cj cccc, cj ciab. cj aloe fix gel is my high dews/summer HG!!
sealants - spiral solutions emollience butter, cj CIAB