"If you are present when a chance presents itself." Vegeta leaves it at that. It all comes down to being in the right situation, and that includes a target. However, "I have been training Trunks not to overlook alien anatomy by using it when I believe he's not expecting it." Got to keep the boy on his toes.

Vegeta then levels a very flat look at Yondu. "You cannot use it as a cupholder." Don't even think about it.