Fall Out Boy star Pete Wentz says kissing Ashlee Simpson is like kissing his best friend.

The bassist - who is rumored to be engaged to Ashlee, the younger sister of Jessica Simpson - shares a deep connection with his girlfriend that goes beyond mere lust.

Ashlee Simpson refuses to let her boyfriend Pete Wentz pose for photographs with female fans.

The 22-year-old singer reportedly dragged the Fall Out Boy frontman away from attractive groupies who approached him for a lasting memento following his performance at Chicago's Hard Rock Hotel last weekend.

Ashlee Simpson and Pete Wentz turned down a free 'KY Intimacy kit' for fear of infuriating Ashlee's father. Ashlee and Pete attended Chicago's Lollapalooza music festival, which he was hosting, and were offered promotional gifts by the event sponsors.

The couple were said to be fearful of being photographed with the sex aid because Ashlee's manager father Joe, a former Baptist minister, would disapprove.

Pete Wentz wants to start a family with Ashlee Simpson.

The Fall Out Boy bassist and former wild child is ready to put his partying behind him and settle down.