Me and my boyfriend been having sex for 3 weeks now. He likes when I. Touch penis before we have sex and I realize that his semen has a weird smell it and its often left on my hands. I never realy thought much about the smell because I didn't really know about semens type of odor. The last time we had sex we didn't use a condom. My period came on the next day. My period was on for the rest of the week. When my period was done. I realized I my vaginal discharge has an odor and it smells just like my boyfriends semen! What does this mean? Could it be an std?