What does it mean when a guy grabs your hand and squeezes it really hard?

[Anonymous]

its like when me and him are sitting down and I could just like snuggle up to him and we'd be holding hands and he'd squeeze my hand really hard but not so hard that it'd hurt. what's that mean?

[wanacot]

He's crazy? He wants to assert himself? He's goofing around? ...

It's hard to say why he would do that... best to just ask him.