help... the guy that ive been seeing has found a red itchy area around where the top of his boxers are. he squeezed it and puss came out. its more like a blister than a spot and is really itchy. it has grown slightly but has stayed the same for the past 2 days. However i have not noticed anything on myself... is this an STI or just an irritated spot? he says he has had nothing like it before?