Not only Aids....the list is here...
Bacterial
Chancroid (Haemophilus ducreyi)
Donovanosis (Granuloma inguinale or Calymmatobacterium granulomatis)
Gonorrhea (Neisseria gonorrhoeae)
Lymphogranuloma venereum (LGV) (Chlamydia trachomatis serotypes L1, L2, L3. See Chlamydia)
Non-gonococcal urethritis (NGU) (Ureaplasma urealyticum or Mycoplasma hominis)
Staphylococcus aureus, MRSA - Sexually transmissible.[6]
Syphilis (Treponema pallidum)
Fungal
Jock Itch - Sexually transmissible.
Yeast Infection
Viral
Cytomegalovirus (CMV) through skin to skin contact, saliva, not only sexually.
Hepatitis B.
(Note: Hepatitis A and Hepatitis E are transmitted via the fæcal-oral route; Hepatitis C is rarely sexually transmittable,[7]and the route of transmission of Hepatitis D is uncertain, but may include sexual transmission.[8] [9] [10])
Herpes simplex
Herpes simplex virus implicated in Alzheimer's disease.[11]
Human Immunodeficiency Virus (HIV/AIDS)
Human papillomavirus (HPV)
Certain strains of HPV cause genital warts
Certain strains of HPV cause dysplasias, which can lead to cervical cancer, penis cancer, anal cancer, oral cancer, head and neck cancer.
Molluscum (MC)
Mononucleosis is spread through saliva, can occur during sex.
Kaposi's sarcoma-associated herpesvirus (KSHV/HHV8)
The cause of Kaposi's sarcoma
Parasites
Pubic lice, colloquially known as "crabs" (Phthirius pubis)
Scabies (Sarcoptes scabiei)
Protozoal
Trichomoniasis (Trichomonas vaginalis)