AIHO
Attention-Induced Head Orgasm. The euphoric head rush some people experience when observing others doing something quietly, intently, and/or lovingly (e.g. drawing a picture, putting on makeup, children playing with toys). This feeling typically occurs more when the action being done is meant for the person with AIHO, such as proofreading their essay or correcting their homework. Some have reported a mild headache after an extended AIHO (more than five minutes).
"Hey man, have you ever gotten that tingling feeling in your head whenever someone is doing something for you?" "You mean AIHO? My teacher was helping me with my math homework the other day and I was getting that feeling like crazy!"