To find proof as to whether he is "in love" or not, Yukimura pats Himuro on the head from point-blank range. Seeing this, Ibarada, an upperclassman in the Ikeda Lab, talks about the need for a control experiment. In other words, in order to prove that the racing of his heart is because of Himuro specifically and not just because he's facing a woman, Yukimura has to pat Kanade and Ibarada on the head too. Himuro, on the other hand, sets out to prove that food made with love tastes better and cooks, but...
Any given thing requires a certain 
amount of mental preparation.
.أيّ عملٍ يتطلّب قدرًا معيّنا من التدريب الذهنيّ
Alles benötigt ein gewisses Maß
an mentaler Vorbereitung.
Todo requiere de cierta preparación.
Todo requiere de cierta preparación.
Il faut bien que je me prépare
psychologiquement.
Ogni cosa richiede 
una certa dose di preparazione mentale.
Para tudo é necessário
algum preparo psicológico.
Любое дело требует моральной подготовки.