well i believe I remember reading about that effect while on. Its a combo of the confidence you have, and I believe you do emit a different hormonal stink. Its an alpha male thing, so also some of it could be in your head
Interestingly enough science shows that by nature man and women are attracted by smell. because you can smell who will have genes that mix well with yours to produce a child with a strong immune system....I need to find that for you guys.