Hormones are a prominent thing within Astartes, a constant thing to make sure they're pumped full of testosterone. Ready for battle.*

But out of the field it's more of a nuance. No way to calm down the constant build of hormones, they're rather…needy. Looking for anything that can keep them calmed down till next battle.

Affection works well. Laid in bed with one, desperately clung to you, you're almost sure the amount of mass on you is crushing.