After you've sired all the kids you want, have a vasectomy. Snip snip. No more fretting about birth control.
There are methods of birth control that do not require irreversible (or risk of being irreversible) surgery that are
more effective than 'the snip' or having 'tubes tied'.
'Implanon' is a sustained release, progesterone based 'implant' that is the size of a match stick and is inserted just under the skin in the inside upper arm area.
It lasts 3 years. It is not affected by diet, other drugs or digestive problems like the contraceptive pill and is relatively painless. IIRC it is the most effective and safe birth control. Success rate is 99.9% and any side effects are usually minimal and are similar to that of the contraceptive pill.