Manusmriti
यथा यथा निषेवन्ते विषयान् विषयात्मकाः । तथा तथा कुशलता तेषां तेषूपजायते ॥ ७३ ॥
In proportion as sensual men indulge in sensual pleasures, in that same proportion their taste for them grows.
english translation
yathA yathA niSevante viSayAn viSayAtmakAH । tathA tathA kuzalatA teSAM teSUpajAyate ॥ 73 ॥
hk transliteration by Sanscript