Well here's a few facts that will hopefully help:
1) Skin- believe it or not, in our mother's wombs, we are all the same sex for a while until a hormone determines whether we will be male or female. What this means is that we are constructed of exactly the same material. The skin on the penis is actually no different from what makes up many parts of your own vulva including the clitoris. The male scrotum is the same tissue of the female labia majora.
2) Pubic hair- like with females, guys are capable of trimming/ shaving if it floats your boat.
3) Erection- Just like a female's nipples or clitoris, erectile tissue is pretty amazing stuff. Imagine a substance that can go from completely soft to hard as a rock with only the addition of blood. Plus once you accept the feelings it can generate within your own body, you just might change your reasoning.