Guts had gone into withdrawal. After fighting with so many Apostles, keeping the whole group safe, breaking one or two ribs and legs, almost dying a few (several) times in Berserk armour, he couldn't find time to attend to other things - man's needs beyond war.

Now The Swordsman had a woman, after so long thinking that he would never love anyone but Casca. He still loved Casca, of course, he still wanted her to regain her memories and heal, but it was a different kind of love.

He desired her as a man desires a woman, she was his partner, one of the pillars of his struggling and fragile equilibrium amid the sea of insanity. And after Guts first lay down with her, he could no longer stop.

Guts had accumulated a lot of sexual tension for years, and when he finally found someone to warm him up, all his biological instincts exploded. Her femininity appeals to The Swordsman's more primal masculinity.

And that was why he was going crazy after so long without being able to hold her the right way, to undress her and take her in bed as quickly as they could.

To his sanity, they finally got a quiet night's rest in a village inn. Farnese was training magic with Schierke and taking care of Casca, Isidro with puck and Serpico doing who knows what, it was just them in a room, alone.

Guts dropped the Dragon Slayer at the side of the bed, and before she could undress to take a shower and wash off her sweat, he gently captured her waist with his mechanical arm from behind, pulling her against him and practically growling in her ear:

"No bath now."