Yes, males do not usually have urinary infection.
Sometimes a simple urine test under microscopy can tell the type of stone.
It is very important that exact nature of stone is determined.
Unless it is known that stones are of Oxalate type, dietary restriction cannot be advised.
However, if stones are of oxalate kind then oxalate containing dietary items should be avoided or reduced… These are too many: 
peanuts, cashew, hazel nuts
tea,
instant coffee (more than 8 ounces a day),
beets,
beans, Like soyabean
Concord grapes, Avoid grape fruit juice
berries (blackberries, raspberries, strawberries, gooseberries, etc. ),
chocolate,
dark leafy green vegetables like spinach,
oranges,
tofu,
sweet potatoes (Shakar Qandi)
tomatoes
Soy products
etc.
We need to remember only about 20% of oxalates are from diet. Rest is made in our body. But still it is helpful to reduce oxalate containing food items.
Lastly, water still could help if by mistake these items are taken in large amount.