Re: A frequent error
"Like my first experience with a naked lady ..."
Do those videos show you the essential prior steps?
How to...
1) deftly unhook her back bra clasp when face to face.
2) unzip the front of her jeans before releasing the top clip/button
(Otherwise the zip may jam - especially on tight jeans)
OR
3) remove her tights
Failure to do any of these smoothly is the hallmark of a novice - but will test her sense of humour about sex.