There are two expressions that I've heard many times but am still unclear what they really mean:<br/><br/>"Be my guest" and "Suit yourself"<br/><br/>For example,<br/><br/>Mary: OK, let me try to convince her.<br/><br/>James: Be my guest/Suit yourself.<br/><br/>Lee: I'll take a walk and will be right back.<br/><br/>Marc: Be my guest/Suit yourself<br/><br/>Could you explain what each expression means and help me distinguish them?<br/><br/>Thanks in advance!