"Please try to hit me. If I do get hit, it's my own fault!"
I'm 2nd kyu, getting ready for 1st kyu. I often tell guys (usually noobs) to hit me. Sensei will tell them to hit me. "She's tough, she can take it. She's 2nd kyu, try to hit her. She'll get out of the way."
It's next to impossible to execute most techniques if uke stops their strike a foot away from nage.
"Really....try to actually HIT me."
It's funny when they say, "Okaaaay..." with that look that says "OK, if you want me to, but you'll be sorry..." Ha. The point is I won't LET them hit me.