not all urut batin is a hanky panky thing la
if an old man massaging you private part, you still consider it as hanky panky stuff?
in english they called it manhood therapy or inner energy massage.
they have certain technique of massaging to enhance man sexual ability as well as
restoring therapy for erectile disfunction/premature ejaculation problems.
basically the massage helps blood flow to your penis(fresh blood supply)

just my two cents anyway, i have an uncle who work as a tukang urut batin.

you're living in the past is it?
proper massage technique helps the body circulate more blood to the penis, thus increasing the length & strength of erection, increasing the visible penis size and improving the sexual stamina. it also remove blood stasis, a pile of blood that block capillaries from delivering fresh blood supply and expand or lengthen penile tissues. somewhat like stretching a muscle.

hey hey hey guys! urut batin is not only for men , applied to women also lah. why everything got to do with 'batin' revolving with men only?