Not do it unless you leave her.... seriously.
Of course a "she" is not going to satisfy a normal woman. DUH! Tell the lesbitch to pound sand and get a good BF.
Talk to your gf and try to spice this up in bed. Don't cheat.
Have you told her you're not satisfied? I know you must feel frustrated but cheating is really not the answer.
Think ? I've done it already.
random guys? seriously? like pick names out of a phone book?
You need adult supervision.