Hi Igor,
I checked out the images and I agree with Kevin, I do not believe you need a disclaimer. As for your second question, here's what could be done:
if the pictures require a disclaimer, I suggest not using those pictures. Top 2 Condom Brands ( Trojan.ca and durex.com) are using any disclaimer, and if they don't i believe they already did their job researching on the matter.
PS: try to make the site with the least errors possible ( both durex and trojan's sites are full of errors :S Weird)
I hope I helped.
Cheers!
Jean