I do not know if this is fitting for this site but if not...it was worth a shot.
You are going on a shopping trip and you walk up to the checkout counter and you have two items. The one item everyone has is a pack of condoms. What would be another item you would buy and make the cashier wonder why you are purchasing those two items . I will start.........this should be interesting to see the combos
Condoms and lighter fluid
Condoms and Hydrochloric Acid.
I can guarantee if you went into Wal Mart and bought Condoms and motor oil, you wouldnt even get a second glance.

Condoms and a Pregnancy Test Kit
A sock puppet
or
Blow up girlfriend