i check my account here at my home...but i signed in my GMAIL account on my friends PC...as i use MY Gmail Username to sign in to Adsense account ...so is there a problem if i check only gmail account at my friends place??
Ask him not to click your ads (even if he is interested) and you will be 100% safe. For 100% safe answer, ask google by emailing them.
Don't use google account at different places,If you have adsense.Because your visitor may in that place.