Some men use these tips for titillation (4)
I believe the answer is:
smut
'titillation' is the definition.
'some men use these tips' is the wordplay.
'tips' says to take the initial letters (tip can refer to the top end of something).
The first letters of 'some men use these' is 'SMUT'.
'for' acts as a link.
(Other definitions for smut that I've seen before include "Obscene filth" , "Indecent stuff" , "Obscene material" , "Indecent talk or piece of soot" , "black spot" .)