Heidi Klum is all about her adventures in the bedroom with her younger husband. RadarOnline.com can reveal how exactly the famous model stays in tip-top shape despite never focusing on a diet. The 51-year-old said: “Sport en chambre is my favorite exercise — it sounds better in French,” referring to “bedroom sports”, in a new interview. She continued: “I have a younger husband”, and confessed the sex with the 35-year-old is before is “very good” because he’s the model’s “match”. Klum, however, gave a more serious response to The Times when it comes to her figure as she admitted that running ar…