The main character Jeff and a woman are romping under the covers, then you see the woman from above straddling over Jeff. Next, the woman gets out of bed and you can see her bare breasts and her rear unclothed, you can see her vulva for a split second from behind as she gets under the covers.
You see the bare butt of the main character in the bathroom. Late in the movie, Jeff has sex with one of the women from the office. Her breasts are shown.