A true story best illustrates my view:
A man in his forties once broke his arm. For his cast, he asked the doctor for a fiberglass wrapping featuring a motif of pink and purple teddy bears on a white background. No one who knew this man said anything to challenge his "manliness." However, a few strangers throughout his recovery did choose to stare, laugh, and even quietly mock him behind his back for his choice. Thankfully for those that mocked him, this man chose to either ignore or forgive them. People such as them could not bring this man down, as he was confident, not in some vague idea of manliness, but just in who he was as a person.
The man's name is not important, but what is important is knowing who he is: In the past he grew up on the wrong side of Las Vegas, he was exposed to heavy gang activity as a teen, eventually he was pressured to join a gang. After he survived being stabbed on two separate occasions, and being shot in the chest once, he decided to go straight, and began a career in martial arts teaching. Between then and the time when he broke his arm, he earned seven stripes on his black belt, commendations from numerous police agencies nationwide for assistance in training their officers, and several invitations to train at the (Northern) Shaolin Temple in Hunan Province, China. He had broken his arm by making a minor error while demonstrating how to break seven bricks with only your bare hands.
I saw a picture that had been taken of him while he wore the cast, and I asked him why he chose it. He replied dismissively, "I don't know, I just liked that one the most." And that is just it: it has nothing to do with whatever arbitrary definitions society may come up with for what is "manly" or not, and indeed, these definitions seem to shift frequently. Just be who you are, because if you are a man, then indeed there is no reason for you to act manly.