"Rubber Love" sounds like one of those movies behind the "over 18"
door.

Better than silicone oil is methyl salicate, "oil of wintergreen", I
think. It's what print shops use by the gallon to rejuvenate their
acres of rubber rollers. Smells just like Doublemint gum. You can
get it in small quantities too.

Don't get the stuff on your fingers though-- it doesnt wash off and
your significant other will think you've been messing with the
Doublemint twins.