The First One I Saw Went Inside Me

What do they really look like?  At nineteen I'm desperate to find out.  I hide in the bathroom just as my older landlord, Richard approaches, peering around the curtain to see that big, delicious thing of his for the first time.  My gasp gives me away and now he wants to know why I'm there.  He decides that now I've seen his, he has to see mine.  This naughty game is only ending one way — with me being taken for the first time!