When Little Jo was smaller and only a toddler, sometimes when out she would tire of walking. Oddly though, while she might tire of walking, she could break into a run when she sited a playground or similar. R used to carry her at times and once hurt his back rather badly while doing so.
I could not carry her. I tried. I put her on my hip, but unless I held her there almost using entirely the strength in my arms, she would slide down, or I would walk with the top half of my body sideways which my neck did not like. Sister told me it was easy. I couldn't do it.
I can only conclude men ought not carry babies or toddlers. It is a woman's job. There are two meanings to baby bearing hips.