The idea is that "losing your virginity" is offensive because it implies shame. Instead people are moving toward the phrase, "sexual debut"
Nicolle Hodges tweets:
Time to rebrand virginity to sexual debut so girls don’t begin their journey at a deficit, feeling like they have lost or given something up. We have few modern rites of passage, and the fact that this transition/discovery is shrouded in shame has to change. It is a celebration!