Plenty of openings (no pun intended).
They want you to do hard work, but they’re not going to pay you? Man, what a ripoff! :mad:
If you’re testing the product’s performance, does that mean that it has a higher likelihood that it could break? Cause then you should get hazard pay as well.
Does Durex provide the “testing apparatus,” as it were? Cause if so then I’ll totally do it and not care about the lack of payment. 
Is it only guys or can girls volunteer, too?
I’m with Heffalump and Roo: If you’re being asked to play what appears to be alpha (or maybe beta) tester for a new line of birth control devices…
I think it’s only fair to find out what compensation one might recieve for any failures of the devices.
Why yes, I often am a “The glass is hall-empty, sort.” Why do you ask? 
Hmm… I wonder if ‘I need you to assist me in some testing’ makes for a good pickup line?
If they do provide testing apparatus as you so delicately phrase it then you’ll have to get in line, a very looooong line
Hell, I’ll even pay Durex if they pick me