Increasing semen

Would love to know if anyone has any thoughts on how to naturally increase the amount of semen I produce, I've been taking some pills containing fenugreek and other items I got online from a sex toy shop but they are expensive and seem to help a little.

I know when my wife has a long foreplay session with my cock I make more.

I love the feeling of my juices spilling from her so the more I can fill her up the better.