This is really tough. I don't know if I would consider HML a "sexy" track, at least in comparison to the others. Erotica and Justify My Love drip with dominatrix fantasy, whereas Britney's tracks are bottom ballads.
This is tough. First of all, I would have added So Happy I Could Die.
For me it goes JML > BOM > SHICD > Erotica > TOMH > HML
But they're all GREAT, AMAZING songs. Some of the best work from all three,
↑ It's all in your mind. Take your chances, turn around. ↓
Madonna | Britney Spears
Rebecca & Fiona | Grimes | Azealia Banks
Florence + The Machine | Lana Del Rey | Marina and the Diamonds
Santigold | Sky Ferreira | M.I.A. | Missy Elliott | Kelis | Taylor Swift | Wynter Gordon | Ke$ha