[BabyCash]

I just came home from a wedding and was checking up on Cash before going to bed and I picked him up and pet him for a little bit when i noticed something red of the tip of his urethra. then I kinda freaked out cuz i thought he was bleeding from his penis when all of a sudden it disappeared! so i guess my question is, what is that red thing? it looked like it was bursting out of his urethra and frankly it was kind of gross. Cash is only 4 mo and 1 weeks old, could he be experiencing some sort of a sexual desire at this age? what age do males usually start with this heightened sexuality? (sorry if I'm being vague, I'm having a hard time with wording) any advice would be greatly appreciated!