We thought that Mal was just being super friendly by happily following Trinity all over the place.
It wasn't until he did. not. give. up. that we realized that there may be some hormones at play.
When I adopted him, they told me that he had just been neutered. And he's 4 years old! (Ugh, some people) So, he's always lived with the typical life of 'being a boy'.
But even though he's had his bits removed, he still acts randy. He meows and meows and meows. He is ALWAYS, and I mean alllllllllways, following her around and getting in her face. Luckily, she hisses or growls at him if he gets too close, and he just backs away. I'm not even sure he knows what he needs to do once he does get close enough to her. He usually just sits RIGHT next to her and STARES at her. Even if she's sleeping! (Like, dude, get a clue, she ain't interested!)