Well the fluid in the testicle is reffered to as hydrocele... But that is a benign condition and not of concern to you...
It seems your husband has a micro penis...Micro penis
is a medical term that describes an unusually small penis. A common criterion is a dorsal erect
penile length of at least 2.5 standard deviation smaller than the mean human penis size that is less than 4cm.
Of the abnormal conditions associated with micro penis, most are conditions of reduced prenatal androgen production or effect.
to post-pubertal adults will produce little or no further growth.
Because hormone treatment rarely achieves average size, a number of surgical techniques like
for penis enlargement have been devised and performed but are not generally considered successful.
The best way to get help is to discuss the problem in detail with your urologist and to opt between surgical interventions
and penile exercises, which are quite helpful in increasing penile length from1-3inches...
Here is a link to site for further reference regarding penile exercises that you can get help from...http://www.penishealth.com/