I'm going to intentionally spread STDs.
Are you serious?
Yes, I'm going to tease my friends doing it.
Intentionally spreading STDs is wrong since doing so is cruel and can permanently affect the health of other people. If you have an STD, you should have it treated by a medical professional and not try to spread it around. It is expected that people address their health issues to prevent them from affecting others in society.
It's my birthday and I can do what I want.
Not if it's hurtful and destructive to others. If you're seriously considering going through with this plan, you should seek help.