| SEX | A sport practiced by adults
| Others |
| SEX | Sacred Energy Xchange
| Others |
| SEX | Sam's Easy X-Ray
| Others |
| SEX | Scary Every Xtime
| Others |
| SEX | Scientific Experimental Xylophone
| Others |
| SEX | Secret Entertainment eXtreme
| Others |
| SEX | Security Emergency Xylophones
| Others |
| SEX | See Enter Extremely
| Others |
| SEX | Set X
| Others |
| SEX | Sex E Xap
| Others |
| SEX | Sexual Entercourse Xoinks
| Others |
| SEX | Sexual Entercourse Xternal
| Others |
| SEX | Sodium Ethyl Xanthate
| Others |
| SEX | Software EXchange
| Others |
| SEX | Solitary Eruptive Xanthogranuloma
| Others |
| SEX | Sotho English Xhosa
| Others |
| SEX | South Eastern Xtreme
| Others |
| SEX | Speaker- Evaluator eXchange
| Others |
| SEX | Stash Enhancement Xperience
| Others |
| SEX | Stash Enhancing eXcursion
| Others |
| SEX | Stash Enhancing eXpedition
| Others |
| SEX | Stash Enhancing eXperience
| Others |
| SEX | Statement Example Explanation
| Others |
| SEX | Systematized Exchange of Xenomemes
| Others |