FFM Threesome with a strap on - Which role would you prefer?

For the ladies out there:

I know we have discussed ad nauseum the use of strap-ons and pegging, but rather than discussing using it on the guy...

IF you were interested in being involved in a threesome with 2 girls and a guy with a strapon and that strapon was to be used on the girl(s), would you rather be the one wearing it, or the one receiving it?

Shane