1. Razors 1
It might be tempting to use your man's razors because they shave better, but use your own instead. Sharing a razor can spread fungal infections such as ringworm or worse, a bacterial infection.
2. Antiperspirant 2
His antiperspirant might smell nice enough for you to apply, but think before you do so. Unlike deodorants that have antimicrobial properties, antiperspirants only stop the sweating which means bacteria still lurks in the surface.
3. Toothbrushes 3
This is probably the LAST thing you want to share with anyone because its so easy to pass infection through the brush bristles.
5. Earphones 5
If you own those earbud earphones, avoid borrowing anyone's or loaning yours to others. Germs from earwax can sit in the earbuds which can lead to ear infections.