Q. What are STDs or STIs? How does one get it? What are its symptoms?
A. Sexually transmitted diseases (STDs), also known as sexually transmitted infections (STIs) are spread by minute germs or organisms during unprotected sex. Sexual activity includes:-

Rubbing genital regions together without penis penetration.
Insertion of fingers or sex toys into the vagina or anus.
Vaginal sex.
Anal sex.
Oral sex.
Oral-anal sex (tongue in or around the anus).