The answer can be both increase in self-esteem and increase in aggression. All of the research generally points to increase of self esteem because during puberty self awareness is very prominant which increases self esteem. I would be safe and go with self esteem. I hope this helps.
The suffix ist means one who, that which.
True. Having HIV connotes gay sex or sex with prostitutes. Both of these types of sex are stigmatized heavily. STDs in general stigmatized, but HIV is especially taboo.
