Studying human spermotozoa motility is a subject of growing importance due to human male subfertility and the fact that the in-vitro fertilisation interventions that bypass normal sperm motility are invasive and entail significant risk for the healthy female partner, as well as being economically prohibitive for many. We present examples of how fluid and continuum dynamics can provide novel insights concerning the mechanics of human spermatozoon behaviour, focussing on the interpretation of recent high resolution imaging.