Possibly, if the person you're sharing with has an active cold sore. Or chicken pox. (But probably not if they have shingles, since that's generally localised away from the mouth area).
Yes, but heres the thing. Most common transmission of oral herpes (cold sore) is skin the skin contact. through kissing and such. Oral Herpes can be transmitted through items such as cups, utensils,...
Yes!!!! Even if the person isn't having any symptoms, it is possible to catch that horrible virus. If they have a active cold sore and you share a cigarette, you will get it for sure. It can't be...