spent most of his lifespent the nightsperanzusperenospermsperm analysissperm banksperm densitysperm poolingsperm preparationsperm recoverysperm whalesperm yspermarchespermatic chordspermatic cordspermatidspermatid androgenspermatismspermatocelespermatocytespermatogenesesspermatogenesisspermatogeneticspermatogoniaspermatogoniumspermatophytaspermatophytesspermatorrheaspermatozoidspermatozoonspermiaspermic samplesspermicidalspermicidespermiductsperminationsperminatorspermiogenesissperm–oocyte interactionsperringsperryspertainingspesificspesific objectsspesificationspesifikspetsnazspewspew one's guts