Original sentence: (It can be questioned, however, why one should regard abstention from such intercourse for one reason [lesbianism or homosexuality] as different from abstention for another or others, and that such individuals may simply never lose their virginity.)  Some people choose to think of their first emotionally significant sex act as being the loss of their virginity, or their first penetrative sex act, or the first act functioning as a potential disease vector, or some other definition varying from person to person
Edited sentence: Some people choose to think of their first emotionally significant sex act as being the loss of their virginity, or their first penetrative sex act, or the first act functioning as a potential disease vector, or some other definition varying from person to person