Heidi Klum Seems to Grab Tom Kaulitz's Crotch While Sunbathing in Cannes

Heidi Klum and Tom Kaulitz caught some rays in Cannes ... and, Klum caught a handful of her man too -- appearing to grab his crotch while they sunbathed together! The supermodel and her musician husband were lying side-by-side at their hotel in the…