Never could see value of completed male circumcision, myself, and, besides, the foreskin provides a richness of sensation, especially when free to move along the shaft. Yes Hygiene v-important, and neglected foreskin can harbour quite a few nasty organisms ( the more so after barebacking ) leading to transmitted disease. No - Urine is not enough for the purposes of cleansing. While normally sterile, the accumulation of uric acid crystals can contribute to inflammatory conditions weakening the tissues and making them more liable to be infected.
Apart from all that, look after your foreskin, fellers, and enjoy the delights !
Oh yes, and Ex looks far from comfortable in that ' containment field ' ! ! She could do with being liberated a little, methinks, however visually stimulating her cock may be.