So this post made me actually laugh, and I could really see flustered Kakashi asking his crush to water Mr. Ukki (who is, practically, plastic - he is a man most often than not gone on missions, after all), thinking he’d leave a present and that they’d have a laugh after, except that… Iruka doesn’t seem to notice Mr. Ukki is plastic. At all. 
https://damnitmoonshine.tumblr.com/post/611589265960386561/iruka-four-months-naruto-whats-he-talking