Trade-offs between investment into male sexual traits and immune function provide the foundation for some of the most prominent models of sexual selection. Post-copulatory sexual selection on the male ejaculate is intense. and therefore trade-offs should occur between investment into the ejaculate and the immune system. Examples of such trade-offs exist. https://www.roneverhart.com/Neumann-KK-205-Supercardioid-Capsule-Head-Black-008654-p29875/