I love Janto: yep. Perhaps its part of why we have the Easter bunny. I think you meant Ianto although Jack mostly drinks water so it fits both of them. I never considered a fear of losing control being a reason why Jack didn't drink.
Owen laughed when a yelp was heard from the kitchen. A very irritated Ianto came in view, his face wet.
"What did you do?" Tosh asked Owen.
"April Fool's teaboy!"
The alarm went off when Gwen entered the hub. "Why is Owen sitting in the corner?" Gwen asked Jack.
"I warned all of you, the coffee maker is off limits for pranks," Jack answered.
"So you put him in the corner?"
"No. Ianto did."
Gwen giggled. "He put Owen in the corner?" She would have loved to see that.
"It serves him right."
"I can hear both of you!" Owen shouted.