4. Steamy Showers
Say you actually walked up all those stairs to get to your "friend's" apartment, head straight for the shower! Get all that sweat and grime off and enjoy some good clean soapy fun. Everyone loves a good intimate shower...especially in the summer. Bring some beers and music and make it a full on shower party. Be careful of the echoes, his roommates might hear you (unless you are into that).
[Photo via @iinkyshop]