AIO for thinking my boyfriends cheating because he shaved

my boyfriend(M20) has been on a lad holiday for the past week and he is there for another 3 days. A few hours ago me(F18) and him were on FaceTime while he was in the shower and he picked up the phone afterwards to show himself in the mirror. I noticed that he was shaved down there even though he wasn’t before he left to go on holidays and he doesn’t make a massive effort to ingeneral. I asked him why he was shaved and the call ended almost straight away. He then tried to play it off after I asked but I feel like he is cheating on me and that’s all I can think about right now. Maybe I’m stretching it but can you guys tell me if I’m overreacting or not? Or how would you take this