No, a man cannot physically feel if his girlfriend slept with someone else. There is no scientifically proven way for someone to sense another person's sexual activity.
However, a man might suspect something is amiss based on:
- Changes in behavior: Sudden shifts in communication patterns, emotional distance, or a change in their partner's physical appearance could be cause for concern.
- Unusual actions: A girlfriend might exhibit unusual behavior like deleting text messages, being secretive about their phone, or avoiding certain topics.
- Gut feeling: Sometimes, a man might simply have a strong intuition that something is wrong, even without concrete evidence.
It's important to remember that these are just potential indicators and do not necessarily confirm infidelity. If a man is concerned about his girlfriend's fidelity, it's best to communicate openly and honestly with her.