use alcohol mouthwash

…
•there's no evidence that mouthwashes could reduce the risk of infection
…

http://www.netdoctor.co.uk/conditions/sexual-health/a12020/infection-risks-associated-with-oral-sex/

HIV infection risk

Because of concerns about the possibility of HIV transmission through the widespread practice of oral sex, the UK Department of Health set up an expert group to report back on the matter. In broad summary, their main conclusions were:
•HIV can be transmitted by oral sex, though this does not occur frequently
•both fellatio and cunnilingus have been known to pass it on
•oral sex is certainly much safer HIV-wise than rectal or anal sex
•oral sex is probably safer than vaginal intercourse
•ulcers in the mouth could increase the risk
•oral sex is more risky than non-penetrative sex (eg mutual masturbation, kissing, etc)
•during fellatio, if the man avoids ejaculation, it probably reduces the risk somewhat
•in the case of cunnilingus, there may be an increased risk of transmission if the woman is menstruating
•there's no evidence that mouthwashes could reduce the risk of infection
•using condoms or 'dental dams' during oral sex could reduce the chance of infection, but not eliminate it.

You can see from the above that there is always some risk of transmission of HIV during oral sex, whatever precautions you take. However, you obviously cannot get infected if your partner does not have the virus.

What other germs could you pick up during oral sex?

As any doctor at a genitourinary medicine (GUM) clinic can tell you, it is possible to acquire several forms of sexually transmitted diseases (STD) through oral sex – if the other person if infected.

Gonorrhoea

Gonorrhoea, a common STD, can be transmitted to the throat during oral sex, especially fellatio. Because of this fact, GUM clinics often take 'throat swabs' these days. In the throat, the germ can cause inflammation, formation of pus and sometimes soreness.

But often, it causes no symptoms at all, and the person just 'carries' it.

In 2011, it was estimated that 1.9 per cent of London prostitutes had unsuspected gonorrhoea in their throats. It's likely that they would give the germ to men whom they fellated.

Syphilis

The lesions of syphilis usually appear on the genitals or the anus – and very rarely on the nipple. But they do sometimes appear on the lips or tongue, as a result of oral sex. And the disease can be caught from an infected person's mouth.

However, please bear in mind that in much of Western Europe, syphilis has been quite uncommon for many years. But in England in 2014, there was an alarming 33 per cent rise in the number of infections! There were 4,317 cases in all, the vast majority of them being in males. In fact, there were only about 250 cases among women. A striking fact is that 86 per cent of men with syphilis in 2014 were men who have sex with men.

Chlamydia

Chlamydia trachomatis is a little genital bug that has become almost epidemic among sexually active young people during the early years of the 21st century.

It's estimated that in some parts of the UK at least 10 per cent of younger adults have it.

It is sometimes found in swabs taken from the throat, and it is thought that it can be transmitted by oral sex, particularly fellatio. In 2011, researchers from University College London revealed that 4 per cent of London sex workers had chlamydia in their throats. This finding is of considerable importance, especially as many men go to prostitutes specifically because they want to be fellated.

Also doctors at Guy's and St Thomas' Hospitals found that about 1 per cent of their gay male patients were carrying chlamydia in the throat.

Please note that if chlamydia gets established in the throat, mouth or nose, it could cause various infections, particularly of the eye. In 2010, doctors warned that oral sex could cause a one-sided chlamydial conjunctivitis, which does not clear up on routine treatment with eye drops.

Do not take advice from people who are not qualified, there will always be a risk, obviously the major risk is HIV, but the chances of contracting HIV through oral sex are low… UNLESS you have a sore or ulcer...

Best defence is a condom, but no one likes giving or receiving oral with a condom on.

Get checked regularly and if the dick looks dodgy dont suck it.  :afr:</extremely>