Titleist - more on anti-selection:
http://www.mans ized.co.uk/answ … -penis-size/a15
What’s the average penis size?
by Dr. Petra Boynton
<section on average erect size from various size studies>
Before you reach for the tape measure, it’s worth knowing that most sex researchers and therapists don't trust these figures.
The reason? They’re based on measurements from laboratory studies where men knew they were participating in research to see how their knobs measured up.
This means guys who were worried about size were less likely to participate, whilst guys who thought they had big schlongs were more than happy to waggle them under researchers noses. So most researchers, therapists and doctors suspect the ‘average’ penis size figures obtained in research (and widely quoted) are at least an inch larger than they should be. This is because research on penis size is skewed in favour of men who are happy to be measured. That’s partly why you sometimes see a range of penis sizes given (as I did at the start of this answer) rather than the mean size, which is unreliable. If you really want a mean measurement then probably 5 inches when erect is more likely than 6 or 7 inches.
Further in the article:
The reason sex therapists or medics are unwilling to discuss penis size is because men are still often not satisfied to hear their penis falls within an average size range - they want to be bigger than average.
Even if you tell guys they're okay, often their body image worries means they're still anxious. A recent US study showed that men seeking penis enlargement consistently overestimate the average penis size of other men and drastically underestimate their own size.
Men get penis hang ups since they usually only see other penises in the changing rooms or toilets - where they view their dick downwards and everyone else's front or side on making other guys seem bigger. Or they compare themselves with porn stars, where the actors are specifically chosen for their size - and filmed from flattering angles.
<SNIP>
That’s not to say that size worries don’t do a lot of damage to many men. Worrying about your penis can lead to relationship problems, avoiding sex or relationships, erectile dysfunction (not being able to get it up) or premature ejaculation (when you come too soon).
If you’re worried about your body or sexual performance, you can get advice from the Sexual Dysfunction Association.
If your worries are severe, your GP can refer you to a psychosexual therapist who can unpack where your problems come from and reassure you you’re okay (there is a waiting list for this service).
Alternatively, you can self-refer to a sex therapist although you’ll have to pay for this therapy. Have a look at the British Association of Sex and Relationship Therapy website.
It’s common for men to have an occasional worry about their penis size - after seeing a bigger guy at the gym, following a negative comment from an ex-partner, or perhaps after reading somewhere you should have a bigger dick. Some gay men also report being under pressure to be big.
Research indicates it’s more common for younger or sexually inexperienced men to have size worries and, with time, these worries reduce. However, for some men it continues to be a problem throughout life.
Guys should start challenging a society that makes them feel they’re only a sexually attractive and functioning person if they have a slightly longer knob.
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NOTE - this is a UK source so the medical groups referred to are in the UK
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