The pros – you fit in with social convention.
In sub-Saharan African countries with very high rates of HIV being circumcised reduces the risk of the male contracting HIV from the female slightly. (It does not however reduce the reduce the risk of the woman contracting it if the man already has it).
The cons – circumcised males statistically take part in more unsafe sex practices as they are told by society they are at less risk of getting an STD and are therefore at a higher risk of contracting an STD. (oh the irony)
Countries with higher rates of circumcised males statistically have more men who develop penile cancer. (the treatment of which is amputation).
The procedure causes pain and physiologic stress and there is a correlation between circumcision and intensity of pain response during vaccination months. A higher risk of meatal stenosis (narrowing of the urethra) leading to discomfort on urination, incontinence, bleeding after urination and recurrent UTI’s.
Males circumcised after commencing sexual activity report significantly less enjoyment. Males circumcised before don’t know what they are missing.
There is no evidence that circumcision aids or improves hygiene in any way. You’ll find just as many disgusting dirty circumcised men as uncircumcised.