Tomura's a violent individual, which was a result of his upbringing and the nature of his quirk. Even with his lover, you, he couldn’t help but express those tendencies.

It wasn't in the way one would imagine. Love was completely foreign to him, so his moments of extreme passion came out aggressively - he would bite you when he should've kissed you and avoid you when he was feeling a bit too aggressively in love with you - but it was all with good intentions.