Meaning of the Sanskrit Word: aupasthya

  aupasthya—pleasure from the genitals    SB 7.6.11, SB 7.6.12, SB 7.6.13, SB 7.6.11-13
  aupasthya—due to the genitals    SB 7.15.18
  aupasthya—sex enjoyment    SB 4.29.54

Can't find any compound Sanskrit words containing aupasthya.